Selective Rendering of Mulitple Subsets

From Fs_wiki

The feature of only view one subset is very useful, but sometimes I want to view more than one subset. I can't find a way to render some subsets while leaving others greyed out. I either have to choose a single subset to render, or render them all. Can we have the ability to select any number of subsets to render? --Footleg 11:21, 29 March 2007 (BST)