Configure Public Mode for Secure Function Lock 3.0
Use the Secure Function Lock screen to set up Public Mode, which limits the functions available to public users. Public users will not need to enter a password to access the features made available through Public Mode settings.
Public Mode includes print jobs sent via Brother iPrint&Scan, and CUPS driver (macOS 10.15 or earlier).
Start your web browser.
Type "https://machine's IP address" in your browser's address bar (where "machine's IP address" is the machine's IP address).
If the machine prompts you for a password, type it, and then click .
Click the Administrator tab.
Click the Restriction Management or User Restriction Function menu in the left navigation bar.
Select Secure Function Lock.
Click the Restricted Functions menu.
In the Public Mode row, select a check box to allow or clear a check box to restrict the function listed.