Hi Mike -
If you have an audio or video clip
selected, the Audio Ducking option
should be available under Tools.
"Restore to Original Volume Level" will be greyed out, unless you've previously modified levels. Other than that, I'm not sure what "Restore" tab you mean.
Cheers - Tony
Visit PDtoots. PowerDirector Tutorials, tips, free resources & more. Subscribe!
Full linked Tutorial Catalog PDtoots happily supports fellow PowerDirector users!