Issue for using Musescore in a live performance Show

Issue to turn pages because size dont sweet with the screen of the mac book (13 '). I would like to use landscape view with a pedal BT. Actually, I'm using the print preview. So it's not efficient during a live performance. I would like to now if it's possible to send sysex data to an external midi hardware when I choose a score.

So many thanks in advance for this soft,

since i discovered it, I went back to music theory