The Conceal Macro Palettes action allows you to:
Select the required option from the pop-up.
The Conceal options include a Reveal if already concealed checkbox, which would reveal the palettes if they are currently concealed.
This action conceals all Keyboard Maestro palettes. It is designed for cases like watching a video full screen where you want to hide all palettes from the screen. The Conceal Macro Palettes until Application Switch variant is particularly useful for watching videos full screen in Safari for example, and then revealing the palettes as soon as you switch out.