[Dave LaRonde] “First, I’d duplicate the old project, delete anything in it I didn’t need, save it”
There’s a handy feature under the File menu in After Effects called ‘Reduce Project.’ If you select a composition (or compositions) and use ‘Reduce Project’ everything in the project that isn’t referenced by that composition (or compositions) will be deleted. Obviously this should be used sparingly, and preferably on a copy of the project in almost every case, but it’s a good way to eliminate everything you don’t need for that one composition from the project.
However, if you pre-rendered anything for the composition it will only save the footage item that is being used and not the source comp for the pre-render. Just something to take note of.
Darby Edelen
Lead Designer
Left Coast Digital
Santa Cruz, CA