Right now it appears that I have to add them one by one, each into their own filter.
Is there a way to paste a list? Seems crazy to add DOZENS of countries to report by "theater" (i.e. AMER, EMEA, APAC). Or is there another way to do this reporting?
since i don't know anything about your current data and what segments you want to make, it's just "best guess". as far as i understand you want to add a country to a list of items (theater), right? maybe classifications? see here:
would you mind sharing a picture what exactly you try to do? within segments you could add the condition "country" with "contains any of" and a list of your countries. but having more information would help to answer your question...
Unfortunately, we can't. This is another forum too haha. Enable SAINT classification on Geo Segmentation Countries
Jantzen.Belliston , do you have any updates on the request to allow for the "contains any of" filter for the "Countries" dimension? This is in segment building (see my photo above)