The F#7 chord (dominant 7th): notes F# A# C# E, degrees 1 – 3 – 5 – ♭7. Guitar shapes: 242322, xx4656, x-9-11-9-11-9, 14-13-11-11-11-12.
A chord is the root plus degrees above it, most often stacked in thirds. Major and minor differ only in the lower third: a major third (M3) sounds bright, a minor third (m3) sounds sad. Pick a chord and a root to see its degrees and intervals, and its shapes.
m — minor, M — major, P — perfect, A — augmented interval; the number is the degree count. m3 is 3 semitones, M3 is 4, P5 is 7
F# F#m F#5 F#7 F#m7 F#maj7 F#sus2 F#sus4 F#add9 F#6 F#m6 F#9 F#dim F#dim7 F#m7♭5 F#aug