This would allow the screen to be used in a more dynamic way.
ie. a numeric key pad I one half of the screen and other objects that could be brought into and out of use allowing the key pad to be used for inputting to different functions without having to have multiple pages.
vis and tsw would work
The vis command is your friend ;-)
Perhaps try reading the Nextion Instruction Set before requests
Hide and Deactivate Components is already implemented over a year now.
The technique you seek has been demonstrated in forum many times.