Force y-axis scale for traffic graphs

[gertty]

I use the traffic graphs dashboard widget to monitor several interfaces, for each of those interfaces, I know the max bandwidth in and out. When I glance at the graphs, I always have to do a double take because the y-axis are all at different scales.

Is it possible to manually enter a max for the Y-Axis? I guess ideally a different max for each interface, but in my case they would all be the same.