When writing notation for guitar the playback is one octave high, is there anyway to leave the notation the same and get the play back to be the same as the guitar would sound?
From the menu item Staff.
Choose Properties.
Choose Midi.
Change the Transposition box to -12.
(plunk)
If you mean outside of MIDI, and just so the player knows you can write 8va above the staff. that means play an octave higher.
Or use the "octave down" option when you select the treble clef (by pressing "c", it doesn't offer with the icon)