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→Fret Maps/Chord Charts
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Each '''horizontal line''' of text represents a string, like tab. The strings are divided by '''vertical bars''', which represent the physical frets. (You fret "behind" the fret like in the maps above; see [[Basic Technique]].) The last '''line of text with a number''' may or may not be present. It specifies the fret numbers [[Position|position]] to use. Only one number is used; it alone is sufficient. All frets to the right are simply +1 fret. Since fretboard maps and chord charts are patterns that can be used on any group of frets on the guitar, they are not necessarily tied to any particular fret numbers, which is where their power lies (example 3 can be used on any group of 4 frets).
In the above examples, the ''0th fret'' is sometimes marked. This means play the open string. This is more common for scale patterns than chord charts. Chord charts can use open strings, even if you fretting far away from the open strings. Thus, open strings are often marked to the left of the leftmost fret, as in examples 2 and 4 above.