@bmccall17 said:
...Now, how does it affect multiple images? Does this only apply to the image face that I am working with?
It will always scale the whole context you arte in. Like Chris says (as he's just beaten me); when you are NOT in a group (i.e. in the "whole model"), the whole model will be scaled. If you only want to scale certain objects, group them first > edit > and scale it inside their editing context. It will only scale whatever is inside the group/component.