1 – 2 – 3 – 4 – 5 – 6 – 7 — the parent major scale, twelve keys
Ionian is the major scale — the parent of the diatonic system.
Seven notes (1 2 3 4 5 6 7), arranged in the pattern
whole-whole-half-whole-whole-whole-half. Every other diatonic mode
is a rotation of this scale.
Used over Imaj7 chords as the default "home key" scale. The
brightest, most stable, most consonant of the modes — the one all
other modes are measured against.
Now 2 octaves, both hands — the same pattern extended up and back with fingering marked above every note in each hand.
Intervals
1 – 2 – 3 – 4 – 5 – 6 – 7. Major scale, no alterations.
Use
Over Imaj7. The reference mode for all others.
01
C major
02
F major
03
B♭ major
04
E♭ major
05
A♭ major
06
D♭ major
07
G♭ major
08
B major
09
E major
10
A major
11
D major
12
G major
The reference scale. All other modes are rotations of this one.