I have set a P/W to the App Lock function on multiple apps.
How can I change the PW?
App Lock helps you block unwanted access to apps by setting a security PIN access code. The PIN code you set must be at least 4 digits long, but not more than 8, and is required every time you want to access the selected restricted apps.
Alternatively, on devices that support fingerprint authentication, a fingerprint confirmation can be used instead of the configured PIN code.
Keep in mind that using the wrong PIN or fingerprint five times in a row, will activate a 30 seconds time-out session. This way, any attempt to break in the protected apps will be blocked.
If you have already selected the apps for applock, go to Settings > Security PIN code > enter the already existing PIN and you will be able to choose another PIN.