I uploaded some pics that are a part of a series recently, and I'd like to add them to a pool. But when I go to add them I can't find where on the posts' pages to add them to the pool I created. Am I looking in the wrong place? I've looked at the pool help page but for some reason I'm just not seeing the "add too pool" option anywhere I look.

Go to your picture.

Check this area:
"Options
Edit
View larger version
Download larger version (blah blah)
Flag for moderation
Add translation
Add to favorites
Add to pool
Set avatar
Post history"

Click on "Add to pool" and choose the pool.

When I go to the posts, there is no "Add to pool", I've looked there and that option doesn't exist for some reason.

I have made screenshots as a visual aid
imgur.com/a/lG6HXqq

I hope this helps

Got it thank you