Noob question here.

Being completely new to modding, I've been trying to replicate some basic mods on the Steam workshop to learn the ins and outs of the CK. I noticed a couple of mods on the SW that change the weight of all potions, or all ingredients.
My question - is it possible to edit a property, weight in this case, of multiple objects at once: rather than changing every one of hundreds of potions, to edit them all at once, or edit a generic standard potion weight? Or would I have to do it the long way?
Sorry if I missed something really obvious, any help would be appreciated.