You're working on some lower thirds, and you've got your ass-kickin', award-contendin' design and animation all worked out and you're riding your keyframe high only to realize... shit. You've got versioning to do. A dozen names and titles, maybe, or region/time zone splits-- whatever. You've done your pretty-making, and now the grunt work comes in.
Open a comp, change the text layer sourcetext, change the other text layer, duplicate the comp, open it up, change the text layer, change the other text layer, duplicate the comp... Yeah, I'd get tired of it too.
Instead of opening any comp (past initial setup), you can change all the text from your
Project Panel and have it propagate into each comp automagically using a handy expression that simplifies the process. Let's hit it.