Image and Video Marking
| Copy | Ctrl key + C |
| Paste | Ctrl key + V |
| Cut | Ctrl key + X |
| Delete | Delete |
| Duplicate | Ctrl key + D |
| Select All | Ctrl key + A |
| Undo | Ctrl key + Z |
| Redo | Ctrl key + Y |
Related: Add markings and edits to images, such as arrows.
https://teachme.jp/8/manuals/4929404
Video Editing (Overall)
| Play, Pause | Space |
Related: Add captions, symbols, or frames to video (Web Browser)
https://teachme.jp/8/manuals/14366698