You can temporarily hide all visible elements that do not print, such as signposts and selection highlights. This allows you to view the current layout as it will appear when printed/exported without switching to Print mode.
Procedure
Press and hold \ (Windows) or ` (macOS).
Result
All non-printing elements in the current layout are hidden until you release the key command. Printing elements appear as they will when printed/exported.
Tip
You can also hide/show individual non-printing elements permanently.