This guitar theory lesson about harmonic equivalents provides six examples, that demonstrate how dominant seventh chords (rootless, altered or extended) can also be considered as other types of chords (min6, dim7, 7).
This short guitar lesson provides 14 ways of connecting dominant chord voicings on the same string set (7 and extended) and three easy lines using the Mixo Blues Scale. A free transcription in PDF (or give what you want) is available here on the GUMROAD store.
In this short lesson for beginners you will learn how to build basic triad chords on guitar, how to connect, hear and recognize them in an easy way, step by step. Four exercises with tab/standard notation and neck diagrams are proposed here, the aim being to play the six main types of triads on different string sets without displacing the hand.
Guide tones are the notes in a chord which leads or gives harmonic pull toward the next chord, these are an excellent way to study and absorb the sound of any chord progression.
Guide tones are used to outline chord progressions in an improvisation.
They are most of the time the 3rd and the 7th because this is what determines whether a chord is major, minor, or dominant.