Nostalrius Begins - Quality wow vanilla realm (1.12)

Hey guys I just recently installed DocUi and I love the look of it. However, I do want to change somethings about it but have no idea how to do it and so was hoping someone experienced with it on this forum could help me! So basically my 2 questions are :

1. How do I set up range indicators on my buttons? So that if i target a monster and I'm too far away to cast anything it will show me that.

2. How do I show my exp bar?

Thank you!