1. How i make a unit to jump in my missions when i press the action form "addaction" or press one of the keyboard like Y one keyboard?

2. How i make a script that the 1st, 2nd , 3rh and 4th will be switches like in racing games if possible?

3. I played the tutorial mission and i found that when i press D key for example, a new hint is fired. how i do that?