Selection, corners, and color

Adjust the selection

• Drag inside a selection to move a rectangle, custom size, fixed polygon, or closed freeform region as a whole.
• Rectangles have 8 handles. After clicking inside to select the frame, arrows or WASD move 1px. Shift + arrows resize. With no frame selected and the color HUD visible, the same keys nudge the sample point.
• With no annotation tool active, dragging outside clears the old selection and starts a new one.
• Double-click an idle selection to copy and finish. Middle-click pins immediately and finishes. The global pin shortcut also pins the current selection instead of reading the clipboard.
• Toolbar Save writes a file and does not close the capture UI.
• Right-click backs out in order: deselect tool → clear selection → exit capture.
• Esc leaves a local edit first, otherwise cancels the capture.

Adjust rounded corners

• With no annotation tool, scroll inside a rectangle, fixed polygon, or closed pen path to round all vertices.
• With a tool selected, scrolling inside the selection changes that tool’s parameter instead.
• Hover a vertex hotspot and the wheel always rounds only that point.
• Scrolling capture, free path, and an unclosed pen path do not accept selection rounding. Circle frames have no corners either.

The color HUD shows a 15×15 zoom, RGB, HEX, and display coordinates p(x,y). The normal wheel is not captured, so it still rounds corners. Shift + wheel only changes crosshair brightness. Re-edit on a pin hides the HUD by default; press Alt (Option on macOS) to toggle it.