I need to number a document, and it needs to look like this:
A1. Title X
A1.1
A1.2
A1.3
A2. Title Y
A2.1
A2.2
A2.3
B1. Title Z
B1.1
B1.2
B1.3
Is this even possible, and how on earth do you do it?
TIA
(p.s. I'm a regular on a name-change as I've asked this question everywhere, and don't want to be rumbled)