Waypoint altitude

Hi,

can someone explain how can you define altitude for each waypoint? I know to define each waypoint LO/LA as a part of flight planning when you are already in game (like multiplayer) but I'm assuming that there is some way to define the altitude for each one of them also.

If you are referring to the altitude reference in the hud there is no way to preset this. It will always be set to 500 m after take-off. You can change the reference altitude in-flight by pressing reference button or engaging altitude hold autopilot. You can otoh read the planned altitude as set in the mission editor in the kneeboard. IRL the pre-planned altitude for Viggens during war-time operations was as low as the pilot dared to fly.