Reddit thread · r/guitarlessons
Fretboard understanding revelation
Explain how mapping I–IV–V triads within CAGED shapes unlocks melodic playing across the fretboard, with examples and a handy fretboard tool link.

Excerpt from the original
I'm a fairly beginner guitar player. Learned my basic open chords and barre chords and learned how the CAGED system works. But still struggled to pick up the guitar and play melodic lines that were satisfying to play. After taking the time to piece together the the triads in the CAGED system. I can now pick up a guitar and just play for hours trying to discover cool sounds without looking at tabs or anything. And I wanted to make this post to help anyone else new that wants to be able to do this as well. By learning the triad shapes for the I IV and V chords in each CAGED position. You can start to play melodically or hit those chord changes when playing with a backing track. Below are a couple of examples of what I mean. [Blue = I, Pink = IV, Green = V](https://preview.redd.it/59nh232rlq8f1.png?width=1918&format=png&auto=webp&s=574f0752d850585c3771ea5f6c6895e0c5dda9dd) In the key of C major I = CEG IV = FAC V = GBD So look for these patterns in the chart and commit them to muscle memory. I use [https://songnotes.net/tools/fret-monster](https://songnotes.net/tools/fret-monster) to find the shapes of all the chords. Try switching to F major arpeggio scale to quickly find
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