Blender, Following a Path with Speed Controls

Another "my memory is so bad I have to make a blog post" entry.  This is a great little video showing how to use the graph editor for path animations.  So you can control the start and end of the path evaluation as well as the gradient of the curve.  

  The other thing I seem unable to remember is how to scale the graph editor axes independently which is very useful when doing find adjustments.  I know I've probably googled this 10 times. 
Ctrl+MMB and move the mouse up or down!!!!  Dumbass.