The chapter

https://docs.kde.org/stable/en/kdeedu/marble/measure-distances.html

needs an overhaul:

- Title should be "Measuring distances and areas in Marble"

- The basic general description should also include a few sentences about the bearing and bearing change settings - including screenshot.

- There should be another subchapter about the different rulers: Polygon Ruler and Circle Ruler. A titled paragraph about the Polygon ruler should describe Area and Perimeter measurement by example including screenshot. A titled paragraph about the Circle ruler should describe  Area and Circumference measurement including a screenshot.