What is this center line when I create m file from mlx file?

I saved mlx file into m file and got this center line. How can one remove it?

Answer 1

[Les Beckham]

I believe that what you are seeing (if you are viewing these in the Matlab editor) is the "Right-hand text limit" line. You can turn it off if you don't like it under Preferences>Editor/Debugger>Right-hand text limit. Uncheck "Show line".

[alpedhuez]

I got to "Preferences>Editor/Debugger." I do not see "Right-hand text limit."Then what is the next step?

[alpedhuez]

I see. Preferences>Editor/Debugge>Display.

[Les Beckham]

Right. Sorry I missed that layer.