Hide The Right Margin Line
The vertical, red line along the right side of the editor window shows the 80 column limit for a fixed width font. To hide this line, do the following:
1
From the menu select Tools ▸ Options.
3
Select "All Languages" from the "Language" drop-down menu, then set the Right Margin parameter to its smallest value of 0 or its largest value of 200. Then click the OK button.