Hello Ursula, my dear friend @campfire , the answer to your questions is about understanding <b style=”font-family: inherit; font-size: inherit; color: var(–bb-body-text-color);”>where the root note of any chord lies along the fretboard. The root note is usually considered the lowest toned note played within a specific chord (equivalent to the lowest string fretted for that chord). Before I go on, if I may, let me remind you of the naturally occurring half steps (1 fret) between B & C, and E & F (<b style=”font-family: inherit; font-size: inherit; color: var(–bb-body-text-color);”>B<i style=”font-family: inherit; font-size: inherit; color: var(–bb-body-text-color);”>ig <b style=”font-family: inherit; font-size: inherit; color: var(–bb-body-text-color);”>C<i style=”font-family: inherit; font-size: inherit; color: var(–bb-body-text-color);”>ats <b style=”font-family: inherit; font-size: inherit; color: var(–bb-body-text-color);”>E<i style=”font-family: inherit; font-size: inherit; color: var(–bb-body-text-color);”>at <b style=”font-family: inherit; font-size: inherit; color: var(–bb-body-text-color);”>F<i style=”font-family: inherit; font-size: inherit; color: var(–bb-body-text-color);”>ish – the metaphor that I use), because this is also an integral part of what I want to say. Let’s start with an E chord (and all of the E family chord shapes). So the root of the open E chord is the open LoE string. So what that means is that any E shaped barre chord has their root on the LoE string. Then for the root of an E shaped barre chord, we’re going follow the “MUSICAL ALPHABET” up the fretboard along that LoE string, starting with openE, then 1st fret F (naturally occurring half step), 3rd fret G, 5th fret A, and so on. That is how you can justify an E shaped barre chord (& E family shaped chords) with the index finger barring all strings along the 3rd fret as a G chord, and so on up the fretboard, following the musical alphabet . The same thing is true for the A family shaped chords, but their root is along the A string – where open = A, 2nd fret = B, 3rd fret =C and so on, following the musical alphabet along the A string.
I hope my way of answering your question was helpful for your journey👍