How do I get rid of the line that represents the page margin?
You don’t. Turn off Page View.
There’s a checkbox in the options to hide the Margin guides: File > Options > Appearance > Page View
The page will be centred within the view. Disable this option to pin the paper edge to the left side of the editor.
Causes a border to be drawn around the printable area within the virtual page.
Spacing between pages Whenmorethanonepageoftextisdisplayed(or more than two, if using Two Pages Across), the number of pixels entered here will buffer each page from the one above it.
Antoni thank you so much for all the extra white space!!!