I definitely gonna get GIMP when I need to do a gif now.
But, doesnt PS allow to do something similar too? It's very strange for me a popular tool like that doesn't have such feature.
I really don't know,i've only tried PS once when i was 7...but since i knew nothing about editing i just thought "lol it's crap" and uninstalled it. Never touched PS since then...
But it definetly should have such a feature...It'd be incredibly weird if not x)
IIRC ps has an option where you can import video files and they are displayed by frames in layers just like gimp. You can then re-size and export it again. I haven't done this myself since I don't work with gifs but it sounds like gimp supports it much better than ps so just use that. Besides, its free.