Let's say your database has enough tables to fill several screens vertically in the Database Explorer tree view, and you have multiple environments such as Development, Testing, Production.

Currently, if you have those tables filling your view, there isn't a visual of which environment contains the tables on your screen, you have to scroll.

It would be nice to increase visibility to the object level at least, if not further in such as into column lists and other areas.

One way to accomplish this involves the environment category icon. Another way, used by some other software, is to color-code the backgrounds.