set default screen variants for some user

hi expert,

actually I'm not sure in which places i have to ask this

basically, I want to set a default screen variant for some users.

ex. there are 4 screen variants when user runs tcode FV50, I want to set that everytime USER001 runs this tcode, they will see a screen with ZVARIANT01

when USER002 & USER003 runs, ZVARIANT02 is used

USER004 using ZVARIANT03 and so on.

please help regarding this request.

thanks,

felix