It would be nice to be able to hide the settings panel at the right side of the screen in order to be able to have more screen real estate to edit screens - especially tablet sized screens.
Currently on devices, like the Surface Pro, that aren't as wide, it makes it very difficult to edit a screen at sufficient size to be viewable due to the settings having to be open. Best would be the ability to not only resize the panel to the right to a much smaller size, but also to have a button at the left edge of it to expand or hide it quickly.
For extra points - consider allowing it to be a floating window that can not only be resized but moved around the screen (outside of the browser window would be even more extra points).
Updating status and adding @mabolan
Also consider to hide the left side panel, similar to Outlook
Please hurry with this. It is so frustrating to develop with such limited space while there are huge panels on either side that are used so much less in comparision. Have to keep zooming right in and right out all the time. Very tedious.