The blue notes are for playing blues. Also you can bend note 2 to match it.
You can also bend note 2 to match note 3, depending on your tune.
Minor key sounds sad, major is happier.
You can play minor or major over a minor backing track.
You must play only major over a major backing track.
Box-4 is awkward to play, so is not shown.
Look online for more info on boxes.
You can play the alternating 1,2,3 and 5,6 note strings and therefore avoid particular boxes.
Watch string 2 tuned to B. You must add 1 fret to the note location regarding the pattern on
the lower strings.
Try using box-2 in particular to noodle around trying your improvisations.
Try playing in box-1 and slide up to box-2, and back to box-1 again.
Master box-1 first as 90% of players use it a lot.
Key of A minor with note 6 on fret 5 of 6th string is used a lot in tutorials.
Also key of E is used frequently on open and 12th frets.
Look online for hammer-ons, pull-offs, slides, bends, and tremolo techniques.
