Frustrating text editing

The text editing features are more than frustrating. My main problems are:

  • When I save a document with my own text added and open it again, the area of my written text is restricted to the original width and I have to pull it wider to add more text in the same line. That doesn't make any sense.

  • Sometimes my text with multiple lines is separated into multiple areas with one line each after saving. That makes even less sense.

  • And how can I black out a rectangular area? To white it out is easy: Comment -> Whiteout. But how do I BLACK it out? The colour of the whiteout-tool cannot be changed.