Draw, erase, fill an enclosed area, or pick an exact board color with the toolbar. Press Control+Z or Command+Z to undo your latest action. Focus the canvas and hold Space to use the selected drawing tool at the keyboard cursor while moving it with arrow keys. Press I or Shift+I to select an image, Escape to deselect it, Delete or Backspace to remove it, Alt plus an arrow key to move it, or left and right brackets to resize it.