To finish your debug session, either allow your application to run to completion or halt it using the square red button in the debug tool bar.
You can go back to the Ada perspective (or any other) by clicking on the Ada perspective icon at the upper right of the Eclipse window. You can close the Debug perspective or leave it open, as you wish. Leaving it open does not make it visible. To close it, right-click on the "Debug" perspective icon and then click on "Close" to close the perspective.
