Family Historian User Group

I would like Colour Coding, when you have a large tree it makes it so much easier to get around. I would like to mark each of my grandparents line.

Did you check Please Read Before Posting Wishes (6176) before posting?

There are already ways to colour say the four grandparent lines in Diagrams by using Box Condition Features.

However, I suspect you mean elsewhere, and there already is Wish List Ref 548 Conditional Colour and Font Options that you can Vote for.