well chords are handled by putting the position of frets above each other. Here's an example
a normal E chord :
E|-0-
B|-0-
G|-1-
D|-2-
A|-2-
E|-0-

and a random normal powerchord :
E|---
B|---
G|---
D|-5-
A|-5-
E|-3-

It's that simple. I hope I answered your question

Latz, Gulder