Managing Your Work Environment > Setting Preferences >
Tooltips Preferences

Use the Tooltips preferences to set how tooltips are displayed. Tooltips display the keyboard shortcut and a brief description for objects (such as buttons and fields) on the user interface.

Auto Display button
  Enable or disable automatic tooltip display. If you disable automatic display of tooltips, you can still display them for selected buttons using the hotkey Ctrl+Alt+spacebar.
Hover field
  Change the amount of time you must position the mouse over the object before the tooltip displays (in seconds).
Duration field
  Change the amount of time that the tooltip is visible (in seconds).