Step 1:
Go to your profile by clicking Me page
Step 2:
Click on the setting icon in the top right corner.
Step 3:
Click on the security option.
Step 4:
We have to enable the passcode option.
Step 5:
Enter the password you want to set.
Step 6:
Re-enter the password for the cross-verification. Once you done by re-entering the password on xallet it get enabled automatically.