Is it possible to change the appearance of visual studio? How to reduce margin sizes?

Question

visual studio

Is it possible to reduce some windows, the error window for example, many of the margins are too large . In the error window, you can remove 30 pixels.
Or the bottom line of notifications, with "Done" and a notification bell. Why is it needed at all ?, but it eats up 20 pixels of height in the meantime.
Can they be removed.

Answer 1

The mouse can be moved to the desired side or unpinned