1. Create Film Repository

Click the + button at the top of the left panel, enter the repository name and select the storage path.

2. Add Films

Hover over the repository, click the + button on the right, and select the folder containing negative scan files.

3. Process and Export

1. 1.Select a film in the left panel
2. 2.Select a photo in the bottom thumbnail bar (use ← → arrow keys for quick switching)
3. 3.Adjust parameters in the right panel
4. 4.Click the toolbar export button to save the positive

Entering and Exiting

• ●Click the Browse button in the center of the title bar to enter Browse mode; click the Edit button to return to Edit mode
• ●Double-clicking a photo in the grid enters Edit mode and loads that photo directly
• ●Switching to Browse mode automatically exits crop, snip, 1:1, and other editing states
• ●In Browse mode the toolbar and bottom thumbnail bar are hidden, and the right panel switches to information cards

Top Filter Bar

• ●Filter: click the operator to cycle through ≥ (at least), ≤ (at most), = (equal); click 1-5 stars to set the filter rating, click the same star again to clear the filter
• ●Sort: click the sort button to open a menu with Filename / Date / Custom (Custom is the order after manual drag reordering; manually dragging photos in Edit mode switches to it automatically)
• ●The counter shows "Showing X / Y total", reflecting the filter result in real time

• ●Export Contact Sheet: click to open the contact sheet export dialog (see the next section)
• ●− / + buttons: each click decreases/increases the photo size by 40 pixels
• ●Zoom slider: drag to adjust the photo size directly (160–640 pixels); the setting is saved automatically

Grid Interactions

• ●Each photo shows its index number in the top-left corner and its star rating centered at the bottom
• ●When switching films, grid photos appear one by one with a staggered dark-to-bright fade-in animation
• ●A floating scroll indicator sits at the right edge of the grid: it appears while scrolling, fades out when scrolling stops, and its length matches the visible proportion

Right Info Panel

In Browse mode the right panel shows two information cards:

Film Info: name, camera, film stock, format, shooting date, total photo count, path. Three text buttons sit on the right of the card title bar — Edit / Copy / Paste:

• ●Edit: opens the Film Info Editing dialog (see the Film Repository Management section)
• ●Copy: copies the film's camera, film stock, and format to the system clipboard
• ●Paste: pastes film info from the clipboard onto the current film — only camera, film stock, and format are overwritten; the film name and shooting date stay unchanged; the button is disabled when the clipboard holds no film info

Photo Info (the currently selected photo):

• ●File name, file size, creation date, source (EXIF scanner device info), path
• ●File Dimensions: resolution of the original file (width × height)
• ●Current Dimensions: the actual size after cropping and accounting for rotation. Editing crop, rotation, or flip in Edit mode updates this automatically
• ●Rating: 5 stars — click to set the rating, click the same star again to clear it; shows "No photo selected" when nothing is selected
• ●Shooting Info: camera, lens, focal length, aperture, shutter, ISO, exposure program (empty fields are hidden automatically), resolved with the precedence photo record > camera from Film Info > positive film EXIF

• ●Edit: opens the Shooting Info dialog to modify the shooting info (see the Film Repository Management section)
• ●Copy: copies the current photo's shooting info (camera, lens, focal length, aperture, shutter, ISO, exposure program — rating not included), shortcut Cmd/Ctrl + C
• ●Paste: pastes the shooting info from the clipboard onto ALL photos selected in the browse grid (multi-select batch apply supported), shortcut Cmd/Ctrl + V; the button is disabled when the clipboard holds no shooting info

Export Contact Sheet

Click the Export Contact Sheet button on the right of the filter bar to compose the film's photos into a single JPEG contact sheet that matches the Browse mode grid style (justified layout, rounded cards, index numbers in the top-left corner) — handy for sharing an overview of a whole roll or archiving it. The export covers the photos actually displayed after filtering and sorting.

Image Stitching

In Browse mode, multiple photos from the same film can be automatically aligned and stitched into a single 16-bit TIFF negative — ideal for combining a scene that was scanned (or digitized) in several passes into one panorama/full frame.

• ●Select 2 or more photos in the grid (Cmd/Ctrl + click toggles photos one by one, Shift + click selects a range)
• ●Right-click any selected photo and choose Image Stitching to open the stitch dialog
• ●The software automatically orders and aligns the photos: thumbnails in stitch order are shown at the top of the dialog (numbered 1, 2, 3…), and the center shows a live stitch preview — rendered with the same processing parameters as the output, so negatives appear as positives; the estimated canvas size is shown below
• ●In the Output Size dropdown, choose Original Size, Long Edge 16384 px, or Long Edge 8192 px (the choice is remembered and restored the next time the dialog opens)
• ●Click Generate Stitched Photo; the dialog stays open while stitching and closes automatically once the new photo appears in the thumbnail list

• ●The result is written to the current film's folder, named after the first photo in stitch order with a _stitch suffix (e.g. A_stitch.tif; _2, _3… are appended on name clashes), automatically imported into the current film and placed right after the last source photo
• ●The output is a 16-bit linear TIFF negative (not inverted) with an embedded linear ICC profile matching the source color configuration — it can be inverted, edited, and exported just like a regular scan
• ●The stitched negative inherits the processing parameters of the first photo in stitch order, except lens correction (the stitched result carries no lens EXIF data)
• ●Alignment uses feature matching with sub-pixel refinement, so adjacent photos need enough overlap; both single-row/column strips and row-by-column grids are supported
• ●This feature requires a valid license or an active trial

Channel Composite

In Browse mode, three photos from the same film can be composited into one full-color 16-bit linear TIFF — a digital rebirth of the classic Trichrome process: three negatives (or three exposures) that each record the red, green, or blue spectral component are combined into a single full-color image. Great for still lifes, architecture, and landscapes.

1. 1.Select exactly 3 photos in the grid
2. 2.Right-click any selected photo and choose Channel Composite to open the composite dialog
3. 3.The software automatically identifies which channel each photo belongs to: colored labels at the top of the dialog mark each photo as the red, green, or blue channel; the center shows a live composite preview and the output size is shown below — the preview and the output share the same rendering, so what you see is what you get
4. 4.Click Generate Composite Photo; the dialog stays open while compositing and closes automatically once the new photo appears in the thumbnail list

• ●The result is written to the current film's folder, imported automatically, and placed right next to the source photos
• ●The output is a 16-bit linear TIFF with a linear ICC profile attached; the composite photo inherits the first photo's processing parameters, and all tools — white balance, curves, masks, and more — work as usual
• ●The sources can be negative scans or photos shot with a digital camera
• ●This feature requires a valid license or an active trial

Entering and Exiting

• ●Click the Frame button in the center of the title bar to enter Frame mode; click the Edit or Browse button to switch to the corresponding mode
• ●Entering Frame mode automatically exits crop, snip, 1:1, and other editing states
• ●Frame mode keeps the left film library panel and the bottom thumbnail bar (use ← → arrow keys to switch photos), hides the editing toolbar, and switches the right panel to the frame parameter panel

Frame

Background Image

Overlays an image on top of the background color as the frame background (e.g. a texture or scene photo). Click Choose Image… to pick an image file (the picked image is copied into the app data directory, so moving or deleting the original file does not affect the frame); click Clear to remove it. The following controls are only available once an image is set:

Photo

Shadow

The shadow style is a frame-level set of parameters shared by the photo and every shadow-enabled overlay item (each item's shadow on/off toggle stays independent).

• ●Style: pick a preset from the dropdown — Diagonal · Standard (offset 1.0/1.0, blur 1.0, opacity 100%), Diagonal · Soft (offset 1.6/1.6, blur 2.2, opacity 70%), Centered · Standard (no offset, blur 1.6, opacity 140%), Centered · Soft (no offset, blur 3.0, opacity 100%). When the current parameters match no preset, the dropdown shows Custom (display-only; selecting it snaps back to the actually matching preset)

Overlay Items

Overlay multiple text or image items (such as a signature, date, or logo) on the frame. They are saved, copied, and exported together with the frame parameters.

• ●Add: click + Text to add a text item, or + Image to pick an image file and add an image item (the image is likewise copied into the app data directory)
• ●Select & manage: items appear in a list (type icon + content/file name); click to select (the item shows a selection box in the preview), click the × on the right of an entry to delete it. You can also click an item directly in the preview to select it and drag to reposition it; click a blank area of the preview to deselect
• ●Text item editing: multi-line text content (line breaks supported); click the font button to open the Choose Font dialog, where you can search and pick a font family, toggle bold/italic, and preview the actual text in real time; click the color swatch to open the color picker
• ●Image item editing: shows the file name; click Re-pick… to replace the image

Sharpen Preview

• ●Enable Sharpen Preview toggle: click to generate a full-image sharpen cache, after which the preview shows the complete sharpened result; a progress dialog with a percentage is shown during generation and can be aborted with Cancel
• ●Sharpen must first be enabled in the Edit mode Sharpen panel for the toggle to be available (otherwise the panel shows a "Enable sharpening in Edit mode first" hint)
• ●Click the toggle again to clear the sharpen cache and restore the unsharpened preview; it turns off automatically when switching photos
• ●The toggle works on the same full-image sharpen cache as the Preview button in the Edit mode Sharpen panel

Copy / Paste / Default

• ●Templates: opens the frame templates dialog
• ●Copy: copies the frame parameters of the current photo (shortcut Cmd/Ctrl + C)
• ●Paste: applies the frame parameters in the clipboard to the current photo (shortcut Cmd/Ctrl + V); pastes to all selected photos when multiple are selected
• ●Default: restores the frame parameters of the current photo to default values; resets all selected photos when multiple are selected

Frame Templates

Frame templates are independent of the Edit mode parameter presets and store a complete set of frame parameters. Click the Templates button at the bottom of the panel to open the frame templates dialog:

• ●Apply Template: select a template in the list and click Apply to apply it to the current photo
• ●Save as New Template: click, type a name in the input box at the end of the list, and press Enter to save the current frame parameters as a template (same-name templates are overwritten)
• ●Update Template: with a template selected, click Update to overwrite it with the current photo's frame parameters (keeping its position in the list); a "Template updated" message appears in the center of the window
• ●Save as System Default: saves the current frame parameters (including the background image and overlay items) as the system default, used by photos that have never had a frame set; a result toast appears in the center of the window after saving
• ●Delete Template: click Delete on the right of a template entry to remove it immediately (no confirmation)

Batch apply: select multiple photos in the bottom thumbnail bar, right-click and choose Apply Template — the dialog title shows "Apply frame template to N photos"; click Apply to apply the template to all selected photos.

Export with Frame

The frame effect is preview-only by default. To include the frame in exports, check Frame: Export with Frame in the export dialog (see the Export Photos section).

Repository Operations

Film Operations

Film Context Menu

Import Photo Options

The import photos dialog provides the following options:

• ●Film Type: choose Negative (default) or Positive (slide film, digital photos). Positive mode uses the ProPhotoRGB gamut and skips the negative-to-positive density transform
• ●Parameter Preset: Auto Adjust (auto exposure + white balance), Default Values (all parameters at defaults), or choose from saved presets
• ●Color Configuration: specify an ICC color configuration (no profile, original file profile, or a custom ICC file)

Film Info Editing

Right-click a film and choose "Edit Info" — or click the Edit button in the title bar of the browse-mode "Film Info" card — to edit the following fields:

Shooting Info Editing

Click the Edit button in the title bar of the browse-mode "Photo Info" card to open the "Shooting Info" dialog and record capture parameters for the current photo:

Film Drag & Drop

Drag and drop to reorder films or migrate them to another repository:

• ●Reorder: drag a film above or below another film in the same repository
• ●Migrate: drag a film onto the target repository, or above/below a film in another repository

Drag Directory Import

Drag a folder directly from the system file manager onto a repository or film in the left panel:

• ●The software automatically scans the folder for photo files (non-recursive, current directory only)
• ●A new film is automatically created with the folder name (a number is appended if a film with the same name exists)
• ●The new film is created in the currently selected repository

Photo Migration

Select photos (multi-select supported) and drag them onto the target film in the left panel.

Thumbnail Operations

Thumbnail Sorting

Filter Bar

A filter bar at the top of the thumbnail bar shows photo information and supports star-rating filtering and sorting:

• ●Source: the photo's scanning device information (read from EXIF)
• ●Camera / Film Stock / Shooting Date: taken from the film info (set via the film context menu "Edit")
• ●Dimensions: cropped photo size (width × height), accounting for width/height swap after rotation
• ●Film: name of the film the photo belongs to
• ●File: the photo's relative path within the film directory

Click 1-5 stars to set the filter threshold, with ≥ (at least), ≤ (at most), = (equal) operators. Click the selected star again to clear the filter. The sort button on the right offers Filename / Date / Custom; manually dragging photos switches to "Custom" automatically. Filter conditions are saved automatically to the film configuration.

Supported Formats

Histogram, Waveform & Vectorscope

An RGB three-channel histogram is shown at the top of the right panel to help judge exposure. Click the Histogram / Waveform buttons on the right of the title bar to switch display modes; click the Vectorscope button to independently expand a color vectorscope below the histogram (its state persists across sessions):

• ●Histogram mode: shows the brightness distribution histogram of the RGB channels
• ●Waveform mode (RGB Parade): shows the brightness distribution of each RGB channel per pixel column as a waveform, with logarithmic density coloring
• ●Vectorscope: pixels are projected onto a color wheel by hue angle and saturation radius as a density cloud, with a continuous hue band and six division markers (R/Y/G/C/B/M)
• ●Skin tone reference line: a skin tone marker at hue ≈ 20° (the classic I-line position) with a small person icon — push the skin tone cloud onto this line for natural portrait color; hovering the marker shows a Skin Tone Reference tooltip
• ●Hover pixel readout: hovering the central preview shows the pixel's R/G/B percentages and Lab values, with a crosshair marking its position on the vectorscope; values fall back to "--" when the cursor leaves; works in fit and 1:1
• ●Pinned sample probe: click the Pin Sample button (crosshair icon) in the readout area to enter sampling mode — the cursor becomes a ring (the outer ring is the sampling extent), then click the preview to pin a sample point: the readout locks to the average of the circular region at that point and no longer follows the mouse, with the vectorscope crosshair pinned there as well; scroll the wheel to adjust the sampling radius (default 5.5 screen pixels, 2 pixels per notch); a pinned point can be repositioned by dragging the white ring marker directly (re-sampling live while you drag — a click still toggles fit⇄1:1); the sample marker follows zoom and pan automatically; works in fit and 1:1; press Esc or click the button again to exit sampling mode — switching photos exits automatically and clears the sample point
• ●Both modes are rendered in real time with GPU acceleration; they also update live while dragging sliders in 1:1 mode (statistics are always based on the full image)
• ●Top-left triangle: underexposure indicator (non-hollow means a channel is underexposed)
• ●Top-right triangle: overexposure indicator (non-hollow means a channel is overexposed)
• ●Hovering shows the over/underexposed areas; moving away hides them automatically
• ●Click a triangle to lock the display state

CPU/GPU Processing Mode

The current rendering backend is shown next to the version number in the title bar. When a GPU backend is shown, click it to force a switch to CPU mode; click again to switch back to GPU mode.

• ●The current photo is reprocessed automatically after switching, and the preview updates immediately
• ●The switch only affects the current session; GPU mode is restored after restarting the app
• ●CPU and GPU paths produce identical results (including lens correction, sharpening, tone curves, and all other features) — only speed differs
• ●Hovering over the indicator shows a "Click to switch CPU / GPU mode" tooltip

Edit History

In Edit mode, click the History button in the lower part of the left panel to open the History panel, which lists every edit step of the current photo in reverse chronological order — the newest step at the top, Import (the initial state when the photo was imported; hover to see the photo's import time) at the bottom, with the current step highlighted in blue.

• ●Hover preview: hovering a step shows the image at that step in the preview in real time, with the histogram, waveform, and vectorscope switching to that step's state as well; moving away restores the current state — ideal for quick comparisons
• ●Click to jump: clicking a step rolls the photo parameters back (or forward) to that step's state, equivalent to a chain of undo/redo operations
• ●Entry content: each row shows the operation name and value change (e.g. "Exposure +0.300"); slider drags are merged into a single entry; panel resets are recorded per panel; auto-adjust and mask operations are recorded as dedicated steps (e.g. Auto Tone, Mask Brush Stroke)
• ●Color configuration switches: switching the ICC color configuration, single-photo or batch, is recorded in Edit History as well (nothing is recorded when the value is unchanged) and can be undone with Cmd/Ctrl+Z
• ●Timestamps: every entry carries its edit time — hover a row for about half a second to see the date and time in a tooltip; the Import baseline at the bottom shows the photo's import time on hover (photos imported before this recording existed, and photos created inside the app such as stitched negatives, have no recorded import time and show nothing); entries from history files saved by older versions show nothing
• ●Reference point: right-click a step and choose Mark as Reference Point to make it the comparison baseline (the reference point row is shown in the highlight color; when none is marked, Import is the default reference point); the reference point is persisted together with the history
• ●Hold to compare: press and hold the Compare button in the toolbar, or hold Ctrl+R (the physical Ctrl key on macOS as well), to switch the preview and the histogram, waveform, and vectorscope to the reference point state; release to return to the current state immediately
• ●Context menu: Clear History After This Step discards all history after that step (run on "Import" to clear the entire history); Clear All History keeps the current parameters as the new Import baseline (with a confirmation dialog; cannot be undone once confirmed)
• ●Merge Adjacent Duplicate Entries: a text button at the bottom of the list that merges consecutive adjustments of the same parameter into a single entry (consecutive operations with a net change of zero are removed outright); adjacent crop entries and mask entries of the same kind are merged as well — useful for slimming down the history

Tone

Core parameters for negative-to-positive conversion:

Channel Exposure

Independently adjust RGB channel exposures to correct color casts:

Batch Auto Adjust

Batch auto-adjust multiple photos:

1. 1.Select one or more photos in the thumbnail bar
2. 2.Right-click the selected photos and choose Auto Adjust
3. 3.The software stitches the selected photos' thumbnails into one large image and runs 2 rounds of auto exposure and auto white balance
4. 4.The computed shared parameters (Max Density, Density Contrast, Red Exposure, Blue Exposure) are applied uniformly to all selected photos, and each photo also gets its own auto black point

Style Match

Drag an external positive photo (JPG, PNG, WebP, BMP, TIFF) from the system file manager onto the right parameter panel to open the Style Match dialog: the software analyzes the reference image's tone and color tendencies and automatically solves a set of adjustment parameters that give the current photo the reference's style.

• ●Side-by-side preview: the left side shows the reference image, the right side shows the current photo with the solved parameters applied in real time; drop a new image into the dialog at any time to replace the reference and recompute
• ●Effective region: drag a box on the reference image to select the region used for analysis — drag inside to move, corner/edge handles to resize, the right-edge anchor to rotate; double-click to clear and restore the full image; releasing the mouse automatically recomputes with the new region
• ●Parameter category toggles: checkboxes listed in solving order (Tone → Channel Exposure → Channel Gamma → White Balance → Tone Curve → Color Grading → Color Mixer → Saturation); unchecking a category skips its adjustment. Channel Exposure/Channel Gamma are shown for negatives only, White Balance for positives only (negatives and positives are solved through their respective pipelines)
• ●Apply: writes the solved parameters to the current photo (recorded as one undo step — roll back with Cmd/Ctrl+Z); Cancel: makes no changes, the original parameters stay untouched
• ●Apply to Entire Roll: independently solves and applies the same reference image's characteristics to every photo in the film, one by one, with a Batch Style Match progress dialog showing the progress

Channel Gamma

Independently adjust RGB channel gamma to correct shadow/highlight color casts.

Channel Purity

Independently adjust the color purity (saturation) of each RGB channel to fine-tune the saturation of specific color channels. Range -0.800 to +0.800. In B&W mode it shows as a single "Purity" slider.

Channel Hue

Independently adjust the hue shift of each RGB channel to fine-tune the tone of specific color channels. Range -0.800 to +0.800. In B&W mode it shows as a single "Hue" slider.

Paper

Choose a suitable paper type for negative photos — different papers correspond to different color styles and contrast.

Common Adjustments

Basic photo adjustment parameters, located under the General tab of the parameter panel:

Tone Curve

Fine tonal control of the image via editable curves, located under the General tab of the parameter panel. Works in both Positive and Negative modes.

• ●RGB master curve (luminance): adjusts the brightness distribution of all channels together
• ●R/G/B per-channel curves: independently adjust the red, green, and blue channel curves
• ●Anchor editing: click directly on the curve to add a new anchor, drag to adjust, double-click to delete (at least 2 points are kept)
• ●Endpoints (black/white point): drag the anchors at either end of the curve to set a new black/white point, like the black/white points of a levels tool
• ●Smooth interpolation: Fritsch-Carlson monotone cubic spline interpolation ensures a smooth curve without reversals
• ●Histogram background: the current channel's histogram is drawn as a semi-transparent filled outline in the curve coordinate system, always showing the image state before tone curve processing
• ●Channel switching: click the colored dots above the curve canvas to switch the edited channel
• ●Reset: the title bar "Reset" button resets all channel curves at once; the ↺ button next to each channel resets that channel individually
• ●Pipeline position: the tone curve runs after color enhancement and before the B&W mode conversion, with GPU-accelerated real-time preview

White Balance

Adjust the color balance of the photo, located under the General tab of the parameter panel:

Color Enhancement

Global color enhancement in linear RGB space, located under the General tab of the parameter panel:

Dehaze

Removes or adds haze in the image, located under the General tab of the parameter panel, after the Color Enhancement panel:

Vignetting

Adds a radial darkening or lightening effect to the image corners (creative vignette), located under the General tab of the parameter panel, after the Dehaze panel:

Color Grading

A professional tonal mapping tool that adjusts hue, saturation, and luminance separately for four tonal ranges — Shadows, Midtones, Highlights, and Global — similar to DaVinci Resolve color wheels. Located under the General tab of the parameter panel, after Color Enhancement and before Color Mixer.

4 tabs (Shadows / Midtones / Highlights / Global) switch the edited range. Each range contains a 2D color wheel (hue + saturation) and a luminance slider. The Global tab additionally provides Balance (adjusts the tonal range boundaries) and Blend (controls effect strength, 0.0-100.0) sliders.

The colored dot at the center of the wheel is draggable — horizontal controls hue shift, vertical controls saturation. The wheel dims when the mouse leaves the panel. A reset button on the right of the title bar restores all defaults with one click.

Color Mixer

A Lightroom-style HSL color adjustment tool that adjusts hue shift, saturation, and luminance for 8 hue anchors (red, orange, yellow, green, cyan, blue, purple, magenta) — 24 sliders in total. Located under the General tab of the parameter panel, after Color Enhancement and before Sharpen.

The interface has three switchable tabs: Hue / Saturation / Luminance — click to switch the displayed adjustment axis. Each hue anchor has a 13×13 color swatch on its left; the swatches dim when the mouse leaves the panel. A reset button is provided on the right of the title bar.

Per-pixel processing with tent weighting (60° half-width); identical algorithms across GPU/CPU/Metal paths. Neutral areas are unaffected. Range -100 to +100.

Point Color

A Lightroom-style point color tool: sample a color with the eyedropper and adjust only the pixels near that hue. Located under the General tab of the parameter panel, after Color Mixer and before Color Calibration.

• ●Adding sample points: click the crosshair icon in the title bar to enter sampling mode, then click a target color in the preview to add a sample point (up to 8); sampling uses the median of a 3×3 pixel box, exactly preserving the color at the clicked position
• ●Swatch list: each sample point is shown as a color swatch — the swatch color is the color on screen when sampled; click a swatch to select it, click the × on the swatch to delete the point
• ●With a sample point selected, adjust the four sliders: Hue (±60°), Saturation (-1.000 to +1.000), Luminance (-1.000 to +1.000), and Range (5-60°, the half-width of the affected hues, default 30°); the Reset button in the title bar restores all adjustments of the selected point
• ●Enable Show affected range: pixels outside the range are dimmed and desaturated in the preview, showing exactly where the selected point takes effect
• ●Self-healing swatches: after changing any parameter such as exposure or white balance, the swatch colors automatically re-sample once the image settles, always reflecting the current color at the sampled position; when parameters are copied across photos the sample positions are not carried over (to avoid being rewritten by re-sampling on the target photo), while the swatch colors stay consistent

Color Calibration

A Lightroom-style camera calibration tool that adjusts the hue and saturation of the RGB primaries plus a shadow tint shift. Located under the General tab of the parameter panel after Color Mixer, and applied at the very bottom of the processing pipeline (before all other adjustments).

The Shadow Tint slider shifts shadows along the green-magenta axis (-100 to +100, fading out as pixel luminance increases). Three tabs — Red Primary / Green Primary / Blue Primary — each adjust the hue (about ±30°) and saturation (about ±50%) of the corresponding primary, all referenced to the white point in CIE xy chromaticity space.

Sharpen

Professional sharpening to restore the detail and texture of scanned film, located under the General tab of the parameter panel. Off by default — enable it manually.

Lens Correction

Automatic distortion, chromatic aberration, and vignetting correction based on the Lensfun lens database, located under the General tab of the parameter panel.

Once lens correction is enabled, the software automatically reads the camera brand and lens model from the photo's EXIF metadata and matches a Lensfun lens profile.

Transform (Perspective Correction)

Lightroom-style perspective (keystone) correction for fixing perspective distortion from copying or scanning, located in the Transform card under the General tab of the parameter panel.

Sprocket Hole

Handles overexposed sprocket hole areas in negative scans so they stay white after conversion. Adjust the threshold (0-1.000, default 0.860) to control detection strictness. Located under the Negative tab of the parameter panel. Supported in both fit and 1:1 modes.

Masks (Local Adjustments)

Masks apply independent parameter adjustments to local areas of the image (Lightroom-style local adjustments). Each photo can have multiple named masks, saved per photo automatically and applied on export. In Edit mode, click the Mask button in the lower part of the left panel to open the mask panel.

Dust & Scratch Removal

Dust & Scratch Removal eliminates dust spots and scratches from scanned images. Repairs are anchored to the physical defects on the film — cropping or rotating the photo afterwards still keeps each repair aligned with its original defect. Repair records are persisted per photo automatically and survive reopening; undo/redo with Cmd/Ctrl+Z works, but the operations do not appear in the Edit History list. In Edit mode, click the Dust button in the lower part of the left panel to open the dust panel.

Image Transform

Image transform operations via toolbar buttons:

• ●Rotate left/right 90°
• ●Flip horizontal/vertical
• ●Level: correct tilt by picking points (e.g. a horizon)
• ●Crop: adjust the photo crop area
• ●Snip: export selected regions as independent files

Level Mode

Corrects the horizontal or vertical line of a photo — for fixing tilt introduced during scanning or shooting.

Crop Mode

Adjusts the crop area of a photo; only the selected part is kept on export.

Snip Mode

Snips local regions of a photo into independent files; multiple snip regions can be created at once.

Color Configuration

The software automatically recognizes ICC profiles embedded in TIFF files.

Click the color config toolbar button to choose: No Profile, Original File Profile, or Custom ICC Profile (supports importing .icc/.icm files). When a positive photo uses "Original File Profile", RAW (including DNG) and JPEG files are decoded preferentially with the operating system's native engine (ImageIO on macOS / WIC on Windows), so the embedded ICC profile is handled by the system engine and colors match the system's own preview (Finder, Preview.app, Windows Photos); if decoding fails, the built-in decoding chain is used as a fallback.

Parameter Copy & Paste

1. 1.On a tuned photo, click Copy Parameters at the bottom of the right panel (or press Cmd/Ctrl + C)
2. 2.Select the photos to apply to (multi-select supported)
3. 3.Click Paste Parameters (or press Cmd/Ctrl + V)

Parameter Preset Management

Presets save a set of adjustment parameters for quick application to other photos later. Frame mode uses independent frame templates (storing a complete set of frame parameters) that do not interfere with adjustment parameter presets (see the Frame Mode section).

View License Status

Click the Purchase/Subscribe button in the window title bar (shown as "License" for licensed users) to open the license management dialog, where you can view: license status, license key, validity period, activated device count, online/offline status, and bound email.

Purchase a License

1. 1.Click the Purchase/Subscribe button in the window title bar to open the purchase dialog
2. 2.Enter the email address to receive the license
3. 3.Choose a subscription plan (monthly or annual) from the price list
4. 4.Choose a payment method: WeChat Pay (scan QR code) or credit card (Paddle checkout)
5. 5.(Optional) Enter a promo code and click Apply for a discount
6. 6.The license is activated automatically after successful payment

Referral Rewards

Licensed users receive a personal referral code and earn subscription time for inviting friends.

• ●View your code: open the license management dialog (the License button in the title bar) — the "My Referral Code" block shows your code with one-click copy, plus how many times it has been used and the total reward days earned
• ●Friend's discount: when a friend (a new user) enters your referral code while purchasing the annual plan, they get 10% off the first year — referral codes are accepted both in the in-app purchase dialog and in the checkout popup on the official website's pricing page
• ●Your reward: for each successful referral, your license validity is automatically extended by 30 days, with no cap

Activate a License

Activate manually in the license management dialog: click Purchase/Subscribe → Enter License Key, input the license key and click Activate License — the status updates automatically on success.

Change Bound Email

Licensed users can change the bound email address in the license management dialog (limited to once every 30 days). After a successful change, the license is automatically resent to the new email.

Change License / Deactivate Device

Single Export

1. 1.Select a photo
2. 2.Click the Export toolbar button, or press Cmd/Ctrl + Shift + E
3. 3.Choose format, bit depth, color space, size, and save location
4. 4.Confirm the export

Batch Export

1. 1.Multi-select photos (Cmd/Ctrl+click or Shift+click)
2. 2.Click the Export button
3. 3.Set a file name suffix (e.g. -positive)
4. 4.Confirm the export

Export Options

The export dialog separates file format, bit depth, and color space into three independent choices for flexible output control. JPG is forced to sRGB; other formats support a choice of color space.

Preview Zoom

The current zoom ratio is shown on the right of the toolbar: fit mode shows a "fit window" percentage, 1:1 mode shows the actual pixel percentage (e.g. 100%, 200%).

• ●Click the zoom ratio button to open a menu: Fit Window, preset ratios (100%, 200%, 300%, etc.)
• ●In 1:1 mode, click the image to zoom in; click again to return to fit mode
• ●In 1:1 mode, hold Alt to temporarily show the crop frame boundaries and drag to fine-tune the crop area
• ●Trial users get full-resolution 1:1 preview; unlicensed non-trial users are limited to 1 megapixel preview resolution

Browsing

Editing

Panel Toggling

Parameter Fine-tuning

Photo Selection

Slider Shortcuts

Shift + wheel: adjust sliders quickly with 10× steps