Quartz Cast Bar Help

[Iannet]

I've recently download Quartz. I'm trying to determine if I can put a marker of somekind at a point in the cast bar - or perhaps have it change color after a certain point. I'm a Fire Mage. I'd like to try to utilize Quartz to help me with the spell queue system. My understanding is that I can queue up the next spell with .25 seconds left in the current cast - such that once queue the spell will cast immediately after the current spell has cast. Can Quartz be setup to provide this type of information? Thanks