The main toolbar provides one-click access to the most commonly used commands in the Vivado IDE. When you hover the mouse cursor over a button, a tooltip appears that provides more information about the command.
Tip: You can set the amount of time before a tooltip appears and disappears. You can also set whether to show tooltips for menu commands. Select . In the Tool Settings section of the Settings dialog box, click the Help category, and set the Tooltips and Quick Help settings.