Keyboard Shortcuts

Switching tools

A	Arrow
T	Text (press again to toggle the text-box variant)
M	Frames (each press cycles rectangle → rounded → ellipse → line)
P / Shift+P	Pen / Highlighter
S	Numbered badges
B	Redaction — black, white, blur, pixelate (each press cycles the mode)
C	Crop (Enter to confirm)
Esc / V	Dismiss (first press closes palettes, second clears the selection)

Editing

Enter	Edit the selected text (both Text and Text Box)
Ctrl+C / X / V	Copy / Cut / Paste
Ctrl+D	Duplicate
Delete	Delete
Ctrl+Z	Undo
Ctrl+Shift+Z / Ctrl+Y	Redo
Ctrl+A	Select all
Shift+Ctrl+A	Deselect (keeps the current tool)

Move & transform (with a selection)

↑↓←→	Nudge 1px
Shift+arrows	Nudge 10px
Alt+arrows	Scale by 0.5% (add Shift for 5%)
Shift+drag	Move along one axis only (no diagonal drift)
Shift while drawing a line/arrow	Snap to 45°

Styling (with a selection)

X	Toggle fill / stroke and open the palette
Shift+X	Swap fill and stroke colors
D	Reset to the tool's default colors
T	Cycle fonts (text selected)

Selecting (mouse)

Drag	Rubber-band select (works from outside the canvas too)
Shift+click	Add to / remove from the selection
Shift+drag (from empty space)	Add by rubber band (add Alt to subtract)
Hold Ctrl	Temporary select tool (rubber-band while a drawing tool is armed)

Double-click

Text	Enter edit mode (both Text and Text Box)
Line-height handle (the ↕ above the text)	Reset line height to the default (1.35)
Letter-spacing handle (the ↔ below the text)	Reset letter spacing to the default (0)

View

1	100% (1 image pixel = 1 screen pixel)
0 / F	Fit to window
+ / −	Zoom in / out (15% steps)
Ctrl+wheel	Zoom
Space	Hand tool (while held)
H	Temporarily hide all annotations (to check the image underneath)

This list reflects the in-development build. The ? panel inside the app is always current.