7 Ways to change the pitch of Audio Regions ( I can think of and all built into Logic )
Click on the region to select it.
make sure Follow tempo & Pitch is checked in the region inspector
Set the transpose parameter to +2 in the region inspector.
Another way add the pitch shifter to channel strip. Change semitones to 2, Mix to 100% and 200 cents ( +2 semitones).
Another way is to add the AUPITCH Plugin -
Another way is to use flex pitch....
Turn it on, highlight all... Drag up two semitones....
Yet another way is to use Time & Pitch Machine.
Did I miss any? - Oh yea! - forgot about the transpose track.
and remembered another - you can change the key signature for loop and bounce them out to new keys
If you have polyphonic material or want large transposition swings my favorite is still Melodyne.