BE PREPARED to spend some time on this article from Kevin Franks. But it will be worth it. The problem is simple:
The popover object in FileMaker 13 presents developers with a wealth of new design opportunities (a number of which were discussed in this article: FileMaker 13 Popovers). But if you’ve tried to use a popover inside a portal, you may have noticed that embedded portals, tab controls and slide controls within those popovers simply do not work as expected… or at all, for that matter…
The rest of the article (and the three downloadable FileMaker examples) show you ways to simulate showing tab controls and slide controls popping up from within a portal:
The third demo got my attention: Simulating a Portal in a Portal, normally a big no-no in FileMaker:
It’s a clever work-around, one that clients will like and one that will make work flow easier. Again, be prepared to invest some time to master it.