Use keys 1, 2, 3, 4, 5... to change the key.
Make sure your ⌨️-keyboard-⌨️ is in the 🇺🇸English Input Source setting. It will not work in other languages.
Below: Fingering for three octave practice.
C Major
Left Hand_: 5, 4, 3, 2, 1, 3, 2, 1, 4, 3, 2, 1, 3, 2, 1, 4, 3, 2, 1, 3, 2, -1-, 2, 3, 1, 2, 3, 4, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 1, 2, 3, 4, 5
Right Hand: 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 1, 2, 3, 4, -5-, 4, 3, 2, 1, 3, 2, 1, 4, 3, 2, 1, 3, 2, 1, 4, 3, 2, 1, 3, 2, 1