Code::Blocks - How to show gutter/vertical right margin line in editor

Question

How to show the vertical right margin line (usually 80 characters) in the editor window in Code::Blocks?

Answer 1

For the current Code::Blocks version (16.01):

1. Go to Toolbar -> Settings -> Editor
2. Under the list of categories (icons) on the left, select Margins and Caret
3. In the Right margin section, change Right margin hint to visible line
4. You can also change the color and column number
5. Click OK to save