Un-matching an item removes any matched information and returns the item to an un-matched state. This can be useful to flush an item with matched details, or if an obscure item has been incorrectly matched and its correct match doesn’t appear in the on-line databases. In cases like this, the item should be un-matched in order to manually enter details. To un-match an item:

• Open the item to it’s Item View
• Click the options menu on the top action bar  
• Choose Unmatch from the menu
• The item is unmatched. Notice that the Poster changes to a generic poster image