Graph Editor - Can I make proportional editing affect all the curves? When I use the Proportional Editing option in Graph Editor it only affects curves that have nodes, selected by me. Why doesn't it affect all the curves? Is there a way to make it affect all the curves?

Essentially I want to select just one node on one curve and drag it with Proportional Edit on, affecting other nodes on all the curves. Can I achieve that?
Select all with the letter A.  There is the Box Select.