Drawing Menu

Right click anywhere in the drawing area to display the following context menu.

Context Menu
Cancel closes the context menu without selecting any item. The same result can also be achieved by clicking somewhere outside the context menu or pressing the Esc key.
Stop ceases pattern drawing immediately (same effect as the stop button).
Clear wipes away the current pattern (same effect as the clear button).
Undo erases the last line drawn or area colored (same effect as the right side of the eraser).
Pickup Color takes the color appearing at the point where the menu was launched and makes it the current color for drawing and coloring. This is much easier than trying to match a color by eye.
Fill Holes changes all bounded areas that are currently the same color as the background to the selected color.