The Transparency Control slide-scale, opened from the View menu, allows user to overlay the DEW window on a related application (i.e. topography mapping) to compare relative locations.
The Transparency Control slide scale establishes the transparency level of the active DEW window:
None - sets viewing mode to the normal opaque DEW window.
Full - sets a totally transparent DEW window, where user can pass control to underlying application.
Exit - closes the Transparency Control window and returns user to the standard DEW window.