UberMenu Control Panel > General Settings > Responsive & Mobile > Responsive Breakpoint
How to set a custom breakpoint video tutorial
Changing when the menu collapses to mobile layout
UberMenu 3 allows you to change the point at which UberMenu collapses. The default is 960px. If you would like to change this to something like 768px, you can do so in the UberMenu Control Panel > General Settings > Responsive & Mobile > Responsive Breakpoint.