I usually crossfade between all clips in a movie. It is a very boring process to drag the clips to overlap one by one while there are hundreds of clips. Is there a way to do this in one operation?
. . . . Can I crossfade all clips in one operation? . . . .
Almost - it takes 2 operations - create the first crossfade then right click and select Apply to all objects in track or Apply to all of the following objects in the track.
There is a subtle difference between the 2 options - with the first you can create the transition anywhere between 2 adjacent objects in the track and apply it to all, with the second option only the objects after the location of new transition are affected.