| Select / Hand / Pen / Eraser | V H P E |
| Rectangle / Ellipse / Arrow | R O A |
| Text / Note / Code / Math | T N C M |
| Highlighter / Image / Plot | L I X |
| Insert image | paste (Ctrl+V) or drag & drop a file |
| Smart shape snap | draw a circle/rect/line, then hold still before release |
| Import PDF | Export menu → Import PDF (.pdf) keeps the design exactly · + editable text adds a text layer · or drag & drop |
| Undo / Redo | Ctrl+Z / Ctrl+Y |
| Duplicate / Copy / Paste | Ctrl+D / C / V |
| Delete selection | Del or Backspace |
| Nudge selection | Arrow keys (Shift = ×10) |
| Pan | Space+drag · middle mouse · wheel |
| Zoom | Ctrl+wheel · pinch · +/− · F fit |
| Grid / Snap / Theme / Hide UI | G S D U |
| Edit any text / equation | Double-click it |
| Constrain shapes / straight arrows | Hold Shift |
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