It would save a lot of time in maintainance if there were a way to link identical objects that happen to be on different pages to one master object.
Sort of like with templates but this control...
Well, it's not that it sets the OBJECT to reference the variable. The variable populates the mapping criteria.
Say, for example, you want to map the page object but you may change server boxes or root URL. You can tell it to use the variable to replace the URL so that, rather than hardcoding the URL in your mapping criteria, it references the variable.
If you update the variable in code, you will need to use RefreshMappingInfo on your browser object to clear the cache of objects but, once you do so, the new value will be used as mapping criteria.