When you drag and drop a file in Mac's Finder, it moves the file by default. To copy the file(s) you must hold down the opt-key while you perform the action.
I found myself in a situation where I have to copy a lot of files, and it doesn't feel very "superuser" having to hold the opt-key down for the whole time. Hence, my question is if I can change the default drag and drop behavior to copy instead of move?