Branch can be enabled by going to File > Setup > System Defaults:
Change current value from "Disabled" to "Enabled and restart NLS for the change to take effect.
The User Guide article for using "Branch" can be found here: https://www2.nortridge.com/support/userguide/topics/branch.html
You can find our training video on using Branch and Cash Drawer located here: https://www.nortridge.com/webinars/branch-and-cash-drawer/