Stamp Tool Modes

When you select the Stamp tool, its properties are displayed in the Tool Properties view.

Draw Behind Mode

When enabled, your drawing strokes will be added underneath the existing artwork instead of over it.

NOTE: Your stroke will appear over your artwork as you draw it, until you release the mouse cursor or tablet pen. If you want a live preview of your stroke, activate the Realistic Preview option by selecting View > Realistic Preview from the top menu.