Where are schemes stored?

When you create a scheme, it is stored in c:\Local Schemes.

When you use ScreenWizard to load a pre-existing screen, ScreenWizard automatically displays all schemes in two locations: c:\Local Schemes, as well as the path indicated under Setup > Set Scheme Directory, which by default is set to a cd drive, but can be set to any computer directory. Note that this path is only used to load pre-existing screens. New screens that you create are in c:\Local Schemes.