So the basic options are to select all and scale up or down velocity as you see fit, or use, say, a ramp. As shown in the vid:
But what I want to do ideally is use the ramp function to scale up velocity but keep the levels relative to each other the same, not a straight ramp. More akin to doing this in effect, but not as fiddly and just in one straight move and scaled properly as in the previous method:
Is there any way to quickly achieve this, perhaps with the PLE?