i was into AE for a while then moved to another job. now i'm back into AE.
the strangest thing happened in AE yesterday. i opened up one of those AE sample files that comes with the program AE4. the comp settings were 720 x 486.
so then i deleted two layers, added one of my own files [a photoshop file that was also set up at 720 x 486], and created the 10-second clip that i wanted. then i went up to comp settings and changed it to 320 x 240 for the web so i could export it to that size. when i did this though, only the sample's layers shrunk to 320 x 240; the new layer i added myself remained at 720 x 486.
anyone have any idea what i did wrong - when i changed comp settings, i wanted all layers to go down to the size i want.
Changing a composition's settings doesn't scale the layers within a composition.
For information on scaling layers, see "Scale or flip a layer". Note that this section refers to a script with which you can scale all of the layers in a composition.
However, if all that you're doing is scaling for output to a smaller frame size, you should consider doing the scaling in the output module. Or you could nest your master composition inside a composition with the dimensions that you want and then scale the nested composition to fit.