Here is a full list of the default Shortcuts BPainter uses.
- BPainter Colorpicker -> Alt+Click or S
- Eraser Switch -> E
- Brush Size -> F
- Brush Opacity -> Shift + F
- Brush Hardness -> Alt+F
- Texture Preview -> L
- Disable Layermask -> Shift + Click on mask
- Invert Layermask -> Ctrl + Click on mask