Chapter 21

• Support both mouse and keyboard use for motion and selection tasks.

• Single-click selects data or changes the control state.

• Double-click means single-click plus action.

• Mouse-down over data means select.

• Mouse-down over controls means propose action; mouse-up means commit to action.

• Indicating pliancy is the most important role of cursor hinting.

• Use cursor hinting to show the meanings of meta-keys.