Hey guys for those of you who would like a mighty fine excellent visual reference guide for all :
Intervals
Scales
Chords
Triads
Open triads
Modes
Heres a free theory book which has helped me a huge amount, it has all scales, intervals and chords and modes, it even includes open triads and drop 2 chords as found in the foundation section! Enjoy
https://drive.google.com/file/d/1zVIA4_YZQMLNS8LEseM5jxv4V5ux4qPa/view?usp=drivesdk