Where can I find the Online User's Guide for my Brother HL-L3290CDW printer?

You can find the Online User's Guide at support.brother.com/manuals. The Online User's Guide includes comprehensive information about Print, Scan, Copy, Fax, mobile device functions, Brother ControlCenter operations, troubleshooting, and network usage. You can also access the guides using Brother Utilities, which is included in the standard installation and can be found as a shortcut on your desktop or in the Windows Start menu. (Pages 3, 5-7)