Hi. Add this code to your scenery file:
event keyCtrl01 multiple 0 none vyhybka001- endevent
event keyCtrl02 multiple 0 none vyhybka001+ endevent
When MaSzyna is running, press SHIFT+1 or SHIFT+2 to turn junction. SHIFT+1 turns junction right or left, SHIFT+2 turns junction to default direction.