Text Box for groups in Matrix

It would be great if there could be an option of a small text/note box under each group in the Matrix scheduler. We use the matrix like a quick view/print off rota for services, but would love to be able to add some notes - like the scripture reading for that week, or sermon title, or a small note for the worship group. It doesn't need to be too big and maybe as a dropdown option if people don't want to use it, so it doesn't affect view. But it would be essential to be able to print it if it contained a note. If it was too much to add one each group section, just one at the bottom would be great. Hope that makes sense!

A note box for each week on the matrix schedule would be great.