Is the modal window the Web 2.0 version of the ever so annoying pop up window? It can be! However, if used cleverly it can provide the flow and ease-of-use of desktop applications.
The modal window (or modal box) is a great way to hide things in order to give the user a great sense of overview and clarity of what he can expect from a user interface. Hiding things like contact forms, sign up forms, etc., can help unclutter an interface.
Modal windows can also be used to hide away large versions of screenshots, or even embedded videos. Modal are most used for hiding away contact forms, login forms, sign up forms, alerts and notices, help and tips, and search boxes.
Enjoy the modal window screenshot collection!