In a recent thread, that I can no longer find,…I THINK I told someone some bad info,…this is what I told them: When UV mapping an object, select the faces in face select mode, load your image into the UV editor, and press ‘T’.
Correction: The key you want is the ‘U’ key! sorry! 
that was on
https://blenderartists.org/forum/viewtopic.php?p=130779&highlight=#130779
you can search for posts that are by a particular user, or find a post of yours and click the profile button, then click “find all posts by Modron”
(I feel a mod should delete this thread once you see it again)
Ah. thanks.