you can get pop-ups to work only when you roll over an object.
so to be clear, you want to be able to customize the "tool tips" for an object type map; right?
This is not an option for maps. There is an option for groups, but that may not work for you.
I'd put a feature request in, if it makes sense to.
remember that tool tips "macros" are system wide and have to refer to a custom property or column in the DB.