Histogram, Waveform, Vectorscope & Navigator
See your exposure — and where you are in the frame
The top of the right panel hosts a GPU-rendered RGB histogram and RGB Parade waveform, plus an optional vectorscope with a skin tone reference line; hovering the preview reads out the pixel's RGB/Lab values and marks its position on the vectorscope, with lockable under/over-exposure region indicators; the navigator at the top left always shows where your 1:1 view sits in the frame. Judging exposure, checking skin tones, locating details — no more guessing.
Highlights
- —RGB three-channel histogram, rendered in real time on the GPU
- —RGB Parade waveform with log-density shading for color balance
- —Vectorscope with a classic I-line skin tone reference for natural portraits
- —Hover the preview for RGB/Lab pixel readout, crosshair-marked on the vectorscope
- —Pinned sample probe: click to pin a sample point, locking the readout to a regional average; scroll to adjust the sampling radius
- —Under/over-exposure triangles; hover to overlay clipping regions
- —Scopes keep computing full-frame stats while you drag sliders at 1:1
- —Navigator: click to enter 1:1, viewport rectangle tracks your position
Histogram and waveform
The histogram shows the luminance distribution of the RGB channels; the waveform (RGB Parade) plots per-column channel distributions with log-density shading, making color balance and exposure spread obvious at a glance. Both are computed in the background from the full image — even while dragging sliders at 1:1, the scopes update in real time without slowing down rendering.
Vectorscope and the skin tone line
Click the Vectorscope button to expand a color vectorscope below the histogram: pixels are projected onto a color wheel by hue angle and saturation radius as a density cloud, with a continuous hue band and six pure-color division markers to orient you. Between red and yellow sits the skin tone marker (hue ≈ 20°, the classic I-line position), joined to the center by a solid line and labeled with a small person icon — push the skin tone cloud onto this line and portraits fall into place.
Hover pixel readout
Hover the central preview and a row below the histogram reads out the pixel under the cursor — R/G/B percentages and Lab values — while the vectorscope marks the same pixel's hue/saturation position with a white-core crosshair. Checking skin tones against the reference line or verifying a neutral gray becomes exact, not estimated. The values fall back to "--" when the cursor leaves; the readout samples the actual displayed, processed image and works in both fit and 1:1 modes.
Pinned sample probe
When you need to keep an eye on the values at one specific spot, click the Pin Sample button in the readout area to enter sampling mode: the cursor becomes a ring (the outer ring is the sampling extent), and clicking the preview pins a sample point — the RGB/Lab readout and the vectorscope crosshair immediately lock to the average of the circular region at that point and stop following the mouse, while still tracking your parameter changes faithfully. Scroll the wheel to adjust the sampling radius 2 pixels per notch; the marker follows zoom and pan automatically, and works in both fit and 1:1; press Esc or click the button again to exit, and switching photos clears the sample point automatically.
Exposure indicators, what you see is what clips
Triangles in the histogram's top corners flag under- and over-exposure. Hover one and the preview overlays the clipping regions, so you can tell a single-channel spill from a full-channel clip at a glance; click to lock the overlay on.
- —Under-exposure: blue (all channels) / cyan (some channels)
- —Over-exposure: red (all channels) / yellow (some channels)
- —Both at once: magenta / light magenta
Full-image navigator
The navigator at the top left of edit mode shows the whole photo: click or drag anywhere to enter 1:1 centered on that point; once zoomed, a white viewport rectangle tracks where the preview sits in the frame, with a zoom-percentage badge in the corner. Checking grain or verifying dust positions — you never get lost.