Generates a plan view whenever you change from one UCS to another.
The UCSFOLLOW setting is saved separately for each viewport. If UCSFOLLOW is turned on for a particular viewport, a plan view is generated in that viewport whenever you change coordinate systems.
The setting of UCSFOLLOW is maintained separately for paper space and model space and can be accessed in either, but the setting is ignored while in paper space (it is always treated as if set to 0). Although you can define a non-world UCS in paper space, the view remains in plan view to the world coordinate system.