Keyboard Focus and the Highlight

Keyboard focus uses the highlight to show you which element of a window, menu, or control will respond to your input. To activate a selected menu item or control (such as a button), press the Spacebar.

In windows and dialog boxes, you can move the keyboard focus among tab groups. A tab group is a collection of related controls, such as a set of buttons.

This portion of a dialog box shows the keyboard focus on the OK button.