Altitude Conversion in Guided Flight Mode

ArduPlane
1

  1. During flight in auto mode

  2. Right click on the map and execute fly here, At this time, the flight mode is changed to Guided.

  3. The plane takes a turn flight at the point I designate.

  4. I want to lower the altitude little by little, so I right-click on the map (the location I specified in item 3) - Fly here - and enter the altitude to fly.

  5. The plane hopes to descend slowly while flying in a large circle, but this will almost always be a dive of more than 45 degrees.

  6. In a situation where plane flying in a big circle from a point on the map, I want the elevation to change slowly.

Can this be modified with a simple parameter setting? If yes, what parameters?