Watch the Chord Vocab: Dom7 online guitar lesson by Rich Maloof from Guitar 201: Breakthroughs
These forms (like the other forms we'll be looking at in this section) are closed, meaning that no open strings are used. The big benefit with learning these closed or barred forms is that you can move them around. Check the charts for fingerings and for bass note grids to help you find your root notes.
Dominant 7 chord nomenclature: