Steerpoint, Auto-Pilot to altitude?

[AngryViper.101]

How do I use the auto pilot to navigate to a steerpoint, and arrive at the same altitude?

Firstly, I engage STRG SEL, and then ATT HOLD, keeps my pitch direction, PITCH ALT HOLD keeps me level?

If I am at 25,000 ft and the Steerpoint I am heading for is 20,000, how do I auto pilot to that steerpoint and altitude?

[Frederf]

There's no direct way to use autopilot in this way. Best you can do is pitch channel to attitude and roll channel to INS steering. You can do some quickie math to figure out how many FPM are needed. There should be an ETE or ETA figure on the HUD. So if your next waypoint is 5 minutes away and you have to lose 5kft then you want a -1000fpm descent. Hold the AP paddle on the stick and dive until that vertical speed is on the VVI tape (between legs or on HUD if enabled). It won't be exact though so it's usually best to get to altitude slightly early and then fly level through the next point.