A lot of things (but almost all of the same type) i don't understand how to do

1 - How do i collapse the empty space? This seems to be caused by allowing text on 2 rows when needed, but if it's not needed, why do i get 2 rows anyway? (RED)
2 - How do i remove/edit the things in the GREEN square?
3 - i found the settings for the Light BLUE square but the first one doesn't remove the line even if it's empty (as you can see). The second one doesn't even have an empty option to choose.
4 - How can i see all albums from an artist without having to click on those arrows to slide? Or at least how can i slide with mousewheel and not clicking on them. (ORANGE)
5 - Nice that i can hide panels depending on which layout i choose, but why i have column browser hiddedn for both Artists and Album covers if i edit only the Artists settings? If i'm watching album covers i need to see also the artist (in the browser)