961 px is not even half of my screen, and the editor is less than half of that. I would like an editor that is 100% width scaling as I am resizing my browser window. Nearly all of the width attributes are fixed px ...

It's great for making a site consistent across platforms and accessibility on low end systems... not so great for high resolutions I have an extremely tiny editor surrounded by empty space.

I see under my profile some really great options for customizing the UI for the site, but I am either totally missing width or it's not there.

Something else to consider might be to move the first column (Attachements, subscription options) into the second and at least make the editor the width of the parent instead of using two columns.

(this might be a lot of work honestly, it's only a suggestion ... I am trying to make ten meaningful posts...)