I already know the answer to this so it is more of a comment and a wishlist
item for discussion more than anything else.

I have a maximum width for images based on the fact that my templates use
770px width limit. (images are 700px)

After implimenting a new template that people can use with a menu on the left
that is 170px wide, the image width limit is now too large for that new
template.

Does anyone have any comment on that fact that you can only set a dimension
limit for all pages created by a user and are there any plans to allow
different choices for different templates?