I like a certain trumpet part from the soundloop House - House By The Sea. I would like to take a part from the song directly and change it up a bit. Is there anyway that I can do that?
Yes, this is very basic editing. I strongly suggest that you read the manual.
You can zoom in on the arranger and drag the left or right end in (or out) to trim out the part that you don't want. Change the snap to 1/16 or 1/32 to be able to get in tighter.