| key          | sub key    | function              | hint                             |
|--------------+------------+-----------------------+----------------------------------|
| b            |            | brush                 |                                  |
|              | d          | draw                  |                                  |
|              | s          | shape                 | select color range before        |
|              | x          | switch color order    |                                  |
|              | a          | alpha shape           |                                  |
|              | ctrl+wheel | brush size            |                                  |
| c            |            | pick color            |                                  |
| e            |            | erase                 |                                  |
| z            |            | zoom                  | click and drag, left+right click |
| middle mouse |            | move canvas           |                                  |
| f            |            | fill                  | inside selection                 |
| ctrl-d       |            | no selection          |                                  |
| m            |            | marquee               | rect selection                   |
| w            |            | select by color       | contiguous: all or only region   |
| q            |            | lasso select          |                                  |
| tab          |            | hide/show layers      |                                  |
| v            |            | switch layer          | by click on region               |
| alt-n        |            | new frame             |                                  |
| shift-n      |            | new layer             |                                  |
| ctrl-f       |            | hide/show ui elements |                                  |
| shift-o      |            | outline tool          |                                  |