How do I delete a photo or a scene?

Click the delete icon on the scene (its tooltip says Delete Panorama) on the tour's Tour tab or Panoramas tab. The Remove Panorama window lists the other tours that use the photo and gives you two choices:

• Remove from Tour takes the scene out of this tour only. The panorama stays in your library and in your other tours, and Add panoramas puts it back.
• Delete Panorama (Everywhere) takes it out of every tour and your library, into the Trash, where Restore brings it back for 30 days.

To change the picture but keep the scene and its hotspots, replace the photo instead: Can I replace a photo without losing my hotspots?. Delete tours and panoramas, and get them back has the rest.