How to turn off vertical line attached to Comment Markers on MacBook?

SGIII, Here is a screenshot of some cells with and some without the vertical lines. I can't remember how these vertical lines were produced, but I would like to know how to turn them off. Does no one know how to generate them? If there is something different about the cells themselves, I don't know what it is.

SGIII, I have discovered what causes the vertical line.

These boxes with text in them are text boxes. If I select the box itself and add a comment the vertical line appears. However, if I only select text within the box and add a comment, the vertical line does not appear.

Amazing that Apple doesn't mention this anywhere in the Manual.

Perhaps I knew about this some 5 years ago when I originally did the diagram, but at 76 years of age now, I did not remember it.

Thanks very much for your help.

Sorry, I assumed the information I had to give to ask the question would have been visible to you. The App is Apple Numbers.