Histogram
The Histogram scope shows value distribution across the selected signal domain. Use it for exposure distribution, channel clipping checks, and mask-range selection.
Modes
RGB
Combined R'G'B' code-value histogram — counts across all three channels overlaid
Split RGB
Separate R/G/B histograms (available only in RGB + Horizontal layout)
Luma
Luma (Y') distribution — weighted sum of the non-linear R'G'B' channels using the active colour space's luma coefficients (Rec. 709: 0.2126 / 0.7152 / 0.0722; Rec. 2020: 0.2627 / 0.6780 / 0.0593). Not to be confused with scene luminance.
Hue
Hue distribution across 0–360°
Saturation
Saturation distribution (0–100%)
Layout & Zoom
Horizontal / Vertical
Histogram orientation
Left to right
Direction control for vertical layout
Mouse wheel
Vertical zoom/scaling (25%–2000%)
Middle-click or Double-click
Reset zoom to 100%
Scale & HDR Guides
Histogram scale follows the active project/input scale (IRE, %, 8-bit, 10-bit, PQ, HLG). Non-linear scales like PQ and HLG are absolute — their bins correspond to decoded nit values via the inverse EOTF, so a peak in the 1 000 nit bin means 1 000 nits, regardless of the display the scope is running on.
When HDR scale mode is set to HDR Reference, PQ/HLG guides include key labels such as:
26 nits — SDR-equivalent midtone reference
203 nits — SMPTE ST 2084-A reference diffuse white
1 000 nits — most common HDR mastering-display peak
Legal-range guides (narrow-range / video-range code values from Rec. 709 and Rec. 2020) are shown where applicable:
8-bit video legal: 16 / 235
10-bit video legal: 64 / 940
Masking
Histogram can be used directly to define mask ranges.
Alt + hover
Show precise value/frequency readout under cursor
Click + drag
Select range and write it to the active mask domain
Mask target by mode:
RGB / Luma: luma range mask
Hue: hue mask
Saturation: saturation mask
Combine this with shape masks from Source Signal for full qualifier workflows.
Appearance
Fill Opacity
Fill intensity from none to 100%
Render histogram edge
Outline the histogram curve
Show gradient
Draw color gradient in the background
Adaptive scaling
Auto-fit visible range for readability
Smooth Graph
Smooth curve rendering
Custom Reference Lines
Up to four custom reference lines are supported.
Per line:
Enable/disable line
Set value in current scale
Set line color
These are useful for recurring deliverable limits or internal targets.
Example Views
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