Hey there, friends! Here’s a walkthrough video of Capo Captain, which is a web-based tool that lets you easily calculate chords, key, and capo position for anything you (or another musician) is playing. There’s a ton of ways you can use this tool, of which I’ll show a few in this video.
While this specific lesson doesn’t have a instructional PDF, my lesson on Capo & Musical Key has a few different visualizations & explanations that give the exact same information. This will no doubt help you calculate the chord & key combinations when using a capo, via printed paper (or digital PDF).
While it’s not strictly required, Capo Captain will benefit from a basic understanding of the chords in each key, Roman numeral notation, and a few other bits of ye olde music theory. I suggest checking out my Practical Music Theory course as well as my Beginner Chord Guide, both of which should help. In the meantime, here’s some specific videos I recommend:
From a chord standpoint, understanding chord families (i.e. the chords in each key) will also help you out big-time. Here’s videos explaining these chord families for the most frequently used major keys: