How do I resize a full-animated object ?

I made a full-animated object, after I exported the scene I realized my object was too big. I want to resize it, I tried to block all the frames and hold shift to select objects I wanted to resize, then use transform to resize. But doesn’t work. My frames got messed up instead. Any advice ?

I think you can add a peg on the top of everything you want to resize avec do it with that peg.

Deactivate the Animate mode (The stick figure button), make the changes you need and activate it again.