1 of 1 people found this helpful
I'm not 100% certain, but based on what you're describing, have you tried choosing sliding based on "Only the objects directly above?" It sounds like the blank space you're describing is a result of adjacent objects being of differing lengths.
Did you also check the "Also resize enclosing parts" option?
Works correctly for objects but am having trouble getting it to work with portals
From the FileMaker Help:
Portals slide like any other non-field object, but objects within a portal can't slide. If you specify that a portal slides up and the enclosing part shrink, FileMaker Pro omits empty portal rows.
Portals make poor choices for printing layouts for this (among other) reason. There are cases where they work well, but sliding isn't one of them. In most cases, you're better served with a List View layout based on the related records and / or another construct (for example, using an HTML table or perhaps a Virtual List).