Deleting a media is safe, cause you will get a list of where it is used, before actually deleting it
As your XpressU Library grows with Media and Presentations, it can become difficult to see which media are included in which Presentations.
We have introduced an overview of which Presentations a medium is part of.
If you press delete a media (Trash can icon), you see this dialog:
You can now choose to delete the media and thus remove it from the Presentation(s) in question. But you can also click on the hyperlink "This media is included in 5 presentations..."
Then you are shown a list of the presentation the media appears in. Click on any of them, to see the presentation.