Guitar Theory - Anchoring 3 Root Notes In One Shape

In this exercise, we practice anchoring at 3 points, which are all 3 the root notes/octaves

This illustration shows 3 E notes at the 12th fret,

However this shape is moveable up and down the frets.

This is a very common 3 point anchor that a lot of musicians use. I know this because i have watched so musicians use it, that i figured there had to be something special about it, and there is...

This shape gives you a good solid foundation on which to build other shapes, both from a music theory view, and from a practical technique view.