How do you command units to move at their native speeds?

I (think I) remember from AoC that you could hold down a hotkey while commanding units to move to make them move at their own native speeds, rather than the slowest speed amongst their group. For example: You've got a group selected made up of Knights, Infantry, and Monks. If you tell them to move somewhere all together, they'll all move at the speed of the Monks. What I'm curious about is a hotkey or clicking of the mouse to make the Knights move at their top speed, the Infantry move at their top speed, and the Monks move as normal at their slow speed.

[I'm not asking about the Monks or Infantry moving as fast as the Knights]