Or can Logic Pro X not do that? MIDI is straight forward through Midi Transform > Transpose, but transposing audio is not quite as easy. It seems like you should be up to select everything and transpose both with one command. I tried adding Transposition to Global Tracks, but it seems to do nothing. I can't seem to move it and when I try, it deselects everything. I cannot click on the little circle at the beginning of the line in the Transposition lane. I cannot grab the line either.