not sure i totally understand your question.
the map will center on the coordinates you enter.
if you want the map to show a specific region, set the coordinates of the map to the center of the region you wish to display.
or you could use just the country, for example, if i enter just US into the address, the map i get back will be centered on the US.
or if I use CA in the state field, the map will be centered on the state of California.