Using Navigation bar and Toolbar
The Navigation bar and Toolbar provide quick access to tools implemented in Database Registration Manager.
The Navigation bar of Database Registration Manager allows you to:
Oracle home
select a group
General
Refresh the list of databases
Apply changes to register selected databases
Selection
Select all selects all databases located in the group, but not registered in <PRODUCT_TITLE>
Uncheck all databases to unregister them
Uncheck deleted DB unchecks databases removed from the server
Legend
Exist on host
Removed from host
NB: You can enable\disable Toolbars and Navigation bars at Environment Options.