| F1 | Help |
| Ctrl+O | Select Files/Directories (open) |
| Ctrl+S | Save Modifications |
| Ctrl+W | Close the current comparison |
| Ctrl+P | |
| F5 | Refresh |
| Ctrl+F5 | Re-verify Contents |
| F4 | Split screen (both files side by side) |
| Ctrl+1 | Left file only |
| Ctrl+2 | Right file only |
| Esc | Back to the directory comparison (previous selection); removes the
search highlighting first if one is active, stops a
running background content check first if
one is in progress (the pairs it had not reached stay
unverified), and closes Diffoniq when it was started as a
diff viewer with two paths and there is nothing to go back to |
| Ctrl+B | Binary Comparison |
| Ctrl+PgDn / Ctrl+PgUp | Next / previous file pair |
| Alt+F4 | Exit |
| Tab / BkSp | Next / previous difference |
| Num + / Num − | Next / previous difference (numeric keypad) |
| PgDn / PgUp | Page forward / backward |
| Ctrl+Home / Ctrl+End | Beginning / end of the file |
| Ctrl+G | Go to a specific line |
| Home / End | Start / end of line (horizontal) |
| ← / → | Scroll horizontally |
| ↑ / ↓ | Scroll, or move the cursor line if cursor mode is active |
| Return | Open the selected pair (directory listing, cursor mode) |
| Ctrl+Z | Undo the last modification (multi-level) |
| Ctrl+Y or Ctrl+Shift+Z | Redo the last undone modification |
| Ctrl+C or Ctrl+Ins | Copy marked lines to the clipboard |
| Ctrl+V or Shift+Ins | Paste clipboard lines into a marked area |
| Del | Delete marked lines |
| Ctrl+F | Find |
| F3 | Find Next (repeat last search forward) |
| Shift+F3 | Find Previous (repeat last search backward) |
| F7 | Hide Matching Areas |
| F8 | Line Numbers |
See also: Mouse Operations