i was trying to filer only turk units so i clicked on the flags of the factions and got a popup screen with options to tick the ones i wanted.

the screen was devided into 3 parts of which the first one was the factions with all of them ticked. i selected unselect all and then ticked only turks. and clicked ok. screen showed a sort of animation showing that it was precessing and turned up the same basic screen.

hope that makes sense :) thanks