Neck charts for the C Major Scale (a.k.a. "Ionian mode") and the A Minor Scale (a.k.a. "Aeolian Mode").
Here's a fingering chart for the C major scale:
The C major scale is the most common scale in western music. You can use it to play over C major chords, including Cmaj7 chords. The C root note is shown in a darker shade of grey. The safest notes in the scale are the root (C), the third (E) and the fifth (G), as these comprise the C major triad.
The C major scale is also known as the C Ionian mode. And, though the magic of modes, it contains several other scales, including its relative minor, the A minor scale:
The A minor scale is also known as the Am Aeolian mode or the "natural minor" scale. You can use it to play over A minor chords, including Am7 chords. The A root notes is shown in a darker shade of grey. The safest notes in the scale are the root (A), the third (C), and the fifth (E), as these comprise the A minor triad.