I think I get it.
The solid lines are time in minutes. So you can read on the chart how many km in distance you travel at a given altitude. The number is at the top of the line
The broken line is fuel remaining in %. You can then again read how much fuel you will have left at a given distance and altitude. The number is next to the line near the bottom.
The first sector called "Stigning" is your climp face. The middle one called "Planeflygt" is level flight. And if the comment above is correct, then the last "Plane", I think it is you cliding/descending, but don't quote me on that.
There are some speeds at the top. But I'm not sure about all the keys