Screen Layout

Hi,

I was messing about editing a post and clicked on “Number of Columns” 1. All the information went underneath the editor and the editor went the full width of the screen.

I didn’t like it so I clicked on “2” for the number of columns. The editor went back to normal size but all the info, featured image, categories etc, stayed underneath the editor where previously they were to the right of the page.

Is there any way to get this back to it’s default setting, as clicking “2” isn’t solving it.

Thanks in advance.