Did you know that Capo is short for Capodastra?
Neither did I until I started reading up on the Capo to figure out what some of my friends (who are guitar teachers) were trying to teach me about Capos.
Here are some websites that teach about Capos on guitars. Some of them have tables that you can print. You'll find that they each have a different way of expressing the table of the use of Capos. The basic idea though is back to the "Capo Triangle" that one of my friend/instructors told me about, it has 3 "sides" which are: The Key of the Chord, The chord shape (and where the Capo is), and the root note of the chord.
And for those who want to go beyond, there's chord transposition with some music theory here: