If installed within a separate application, such as MacWrite, their functionality would be accessible only when that application was running. They resided in the System file's 'DRVR' resources, like actual drivers, though they could be installed in any file whose resources were loaded into the memory, and were stored in 'suitcases' when not installed in the system file. Because DAs were not installed or launched in the same way that applications were, the user could not drag and drop DAs into or out of the system. A special Font/DA Mover utility was used to change the configuration of DAs.
