Hi Darby,
Thanks! That sounds more like my situation. They should be almost identical pre comps of animated text that is time mapped and has an loopout() expression. It puzzles me why one has the black diamond and is not “extendable”.
I created the top one, let’s call it PCA, without the black diamond and it is still extendable. Rather than recreate all the effects and keyframes,
-I just duplicated PCA and called it PCB
-changed the text inside
So with exception of the text changed, everything should be identical, but as you see it is not on the timeline:
-visually with the black diamond
-functionally in that I can’t extend the PCB pre-comp