I have a very crowded layout with several portals in full screen mode. Is there any way to have another table open as a smaller 'pop-up'window rather than adding another portal to the layout, without the main window dropping out of full screen?

... and what about portals inside Tab Pannels ?

May be you'll find different tips just to do this.

But an another way (mine), is to take a look at

http://www.bh-a.com/layoutproperties/

by Fabrice Nordmann.

which solves the problem, among many other things

Gilles