Make margins of document adjustable

[jkwnki]

Hi,

please implement extensible margins in the text area. For instance fixed margin of 3cm or, if possible, a margin that could be set through settings.
I often switch between floting and fullscreen to have another/better/larger overwiew of text area. This is atm not given.

Additionally code blocks dont line break atm. The more the need for a larger text area.

P.S. I very much appreciate the disappearance of the unnecessary beauty :)

Greetings
jkwnki