no-redraw-on-reenter

no-redraw-on-reenter is a variable defined in `C source code'.
Its value is

nil

Documentation:
Non-nil means no need to redraw entire frame after suspending.
A non-nil value is useful if the terminal can automatically preserve
Emacs's frame display when you reenter Emacs.
It is up to you to set this variable if your terminal can do that.

You can customize this variable.