To change your password you need to go to Account section and scroll down to Password button:
In the following window, you need to type your current password and new password, which must meet the following criteria:
password must be at least 7 characters,
password must contain at least one number,
contain at least one special character: !"@;%?*{}+
Once you type your new password, tap Next and your password will be changed.
Note 1: Make sure you remember your password.
Note 2: You can use password generator to create complex passwords to assure maximum security of your crypto assets.