You can easily change the connection in an open window to a connection you currently have open or a connection that you have recently used.
To change the active connection in a window
Click the arrow beside in the window toolbar and select an open or recent connection from the drop-down.
To test connections if the session has dropped
Select Session | Test Connections (Reconnect)
Session | Test All Connections (Reconnect)
To test connections in the Database Login window
Select connections in the grid and click . Toad opens a new session to test the connection and lists any errors that occur.
Toad provides a number of ways to end a database connection.
To end one connection
Select Session | End Connection.
Click in the standard toolbar to end the currently active session. You can also click the arrow by the button to select a different open connection to end.
Right-click the connection name in the toolbar, then select End Connection.
To end all connections
Select Session | End All Connections.
Tip: You can also right-click the connection in the Connection Bar, and select Commit or Rollback. You can also commit or rollback a session from Session | Transaction in the main menu.