The content width should not be limited to 2/3 on a desktop

[jeffhtu]

The content of the document is limited to 2/3 of the screen, which requires me to scroll to see the rest of the content despite the fact my monitor resolution is high enough to display them all in the first place. I have included the style that's causing this. See attached.

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[jeffhtu]

I didn't see a way for me to add a label.