Left-click drag to pan, mouse wheel to zoom; click the original image to open the color picker, Alt+left-click for quick color picking; touchscreen: one-finger drag, two-finger zoom; binarize: use Shift/Meta buttons for one-finger selection; Shift+left-click to select, right-click drag an existing box; ⌘+left-click to select a range box, ⌘+right-click to drag a range box; ⌘/Ctrl+V to paste a clipboard image
| Character | Width/Height | Matrix Description |
|---|
Select preview to edit; use vertical arrows to switch; press Delete to delete a row; press Enter in the Text box to add/update a matrix