Resting Armature

Is there a way to reset a pose to the rest pose without manually moving each piece. Now that I’ve really thought about it, you could key at rest. by is there any other way.

One way: In pose mode, select all bones (A-key) then Alt-R, Alt-G, Alt-S to zero out rotation, location, and scalation. Make sure you key the new positions if you want to use this as a real pose.