drums editing help

Put all drum trcks into a folder (track folder), then you can cut the folder part and all tracks will be cut at the same time.
Or you can highlight all the drum tracks, by wrapping them with your mouse (ctl - click and wrap them)

You may want to enable the snap to grid and check the box that says cut at zero crossings. with that said, you still may need to fade the start and ends, so you dont get artifacts. This is digitla audio and any abrupt interuption could cause glitches in the audio, even if its cut at zero crossings.