Change scale

In "Scales" mode
In "Modes" mode
In "Scales" mode

Navigate to the "Scales" mode of the app:

Tap on the scale name and select a scale from the expandable scales list:

In "Modes" mode

Navigate to the "Modes" mode of the app:

Tap on the mode name and select a scale from the expandable scales list:

Fun fact: You can also shake your device to get a random scale!