While EMI is a very lovely mod, what I don't like when making my own modpacks and including EMI (and also JEI, but hat's another mod) is when I want to hide a lot of items, I have to change the hinding keybind to the mouse button and suffer early carpal tunnel clicking items one by one (especially Chipped and Rechiseled). I wish EMI had the ability to batch hide items by simply holding a keybind and draging the mouse, saving many from early carpal tunnel. Such a feature already exists in REI and it is awesome and having a simillar option in REI would be wonderful. Either that or the ability to just hide ALL the items from a selected mod, not just those that share ID's.

I hope it's at least possible to do so!

You can hide many stacks at once by directly making entries in the resource format using the techniques described in the wiki: https://github.com/emilyploszaj/emi/wiki/Hiding-and-Adding-Index-Stacks

Using filters and the regex /chipped:/, for example, will hide every item from chipped in one line

While that is good news for me, it would still be neat if it was possible to do in-game, as not everyone knows how to make recourcepacks/datapacks and some find it esier to do so with visual aid.