How to hide screen part during presentation?

To hide screen part during presentation, you can use the Curtain tool of Presentation Assistant.

Simply click Curtain on the main pane, as shown below.

• Exit Curtain with Escape or double-click.
• Right-click to select the transparency level of the background.
• You can also push the hotkey to launch or close Curtain Tool. The default hotkey is Alt + C.