THANK YOU!
That is exactly what I was looking for. Alas, I'm using Dark Mode in Calibre, and the lines are so faint, you can barely see them.
See the attached photo.
I apologize for my delay in answering. I was in the middle of a major project with Calibre and could not turn it off for several days so I couldn't make that change until this morning.
I do wish certain parts of Calibre's Dark Mode were
NOT so dark.
Thanks, again.
**