How can I hide the dock / taskbar when I enable the kantanMapper output?

[froehlicht]

When I click on “Toggle Output” the output of kantanMapper appears on the screen I selected. Unfortunately, the MacOs dock and taskbar are also visible. How can I change this? I have added a screenshot with my settings.

[froehlicht]

Here is a screenshot of the second screen with the dock and taskbar that need to disappear: