v1.0.7

• Region picker in true HDR: "Select region on screen (drag)" now previews
  the frozen screen from the app's own HDR capture instead of an SDR GDI
  screenshot. Same gestures: drag to select, release / Enter confirms,
  Esc / right-click cancels. Thanks to Kaldaien (Special K / SKIV) for
  flagging the GDI path.
• Stacked layout for portrait monitors: Controls > Layout > "Stack panels
  vertically" (or right-click the 2 / 4 layout button) arranges the 2- and
  4-panel layouts top-to-bottom. In the 4-panel grid panel 2 goes under
  panel 1, and the automatic square/stretchy split now moves the horizontal
  divider instead of the vertical one.
• Average luminance in the top readout: the mean luminance of every pixel in
  the scoped region, in nits — the frame's overall light level. Off by
  default; turn it on under Controls > Quality & display > "Average
  luminance".
• Fixed: switching the captured monitor between an HDR and an SDR output of
  the same resolution kept showing the old monitor's last frame.
• Fixed: for saturated wide-gamut colors the peak readout's L could read
  higher than the same pixel's hovered L; all readouts now share one
  luminance formula.
• The exe now carries version metadata (file/product version, product name,
  copyright).

Full Changelog: v1.0.6...v1.0.7