For process flows with Auto arrange turned on, the default arrangement is vertical. There should be an option to allow a horizontal arrangement of process steps. For process steps that create many data sets, the vertical alignment causes excessive scrolling. If steps are arranged horizontally then one can view many process steps on a single screen without scrolling regardless of the number of generated data sets.
Please see the post below where I describe a workaround for this issue with screenshots.
Navigating SAS EG process flow map that is too large to scroll through - SAS Support Communities
It seems that allowing a horizontal auto arrange option will alleviate this problem.