Width in Custom Reports

I created a report with Subtable. The table at first level is very wide, so I have two questions:

Is there a way to tell the widget to be as wide as possible? When I call up the report page, only about 2/3 of the available space is used.

Also, the subtable contains much fewer columns, but is totally stretched, so I can’t see all values at once, although that would be possible. Is there a way to limit the width of the subtable?

Is it also possible to say for individual columns that they may only have a certain width, for example, but take up several lines?

I would be happy if someone could help me! :slight_smile: