Visual settings - differentiating between days

Would love the ability to change the weight of the line between days on the calendar.

As front of house I have 4 practitioners, and function happily with them all on one screen, however it would be nice to be able to differentiate between days easily at a glance, either by a custom adjustment to the width of the line between days, or for it just to be a bit heavier and darker than between practitioners.

Personally I don’t like the time of day indicator line, so it’s turned off.

Thanks team!