Add Vertical lines

[moiznagpur]

Found this repo very useful.
I am using this to make calligraphy lines for Arabic.

It would be very helpful if you add an option to draw additional vertical and horizontal lines as well.
Lines should be at the distance of nib width and of a lighter gray color (50-75%).
Also it would be nice to have an option hide the squares and add text somewhere on the page, which contains details of nib size.
Thanks and regards.