Finding shortcuts is impossible without lots of searching (I wish adobe would make an app, or something for this!)
Anyhow, is there a shortcut to scale a clip to fit onto a timeline of different resolution? ie 1920x1080 onto a 1280x720 timeline I have to do this many, many times, so I'd like to see if there's a shortcut....
In the timeline it's done via right click>Scale to Frame.
But in Preferences, you can set the Default Scale to Frame Size option to make it automatic. (Only applies to footage not yet imported, though.)