If you ever had this happen, you
go to drag some files from one folder to another, and instead of putting
them on the folder you wanted, you accidentally dropped them somewhere
else. You open up that folder and you find, oh dear, they’re mixed
in with a bunch of other files. And I don’t remember exactly which
ones I moved.It’s very simple. Hold down your control, key push Z. And
that undoes the accidental copy that you just did.