Within YUDU Publisher, one can delete individual files in use by a digital publication or use the new bulk delete feature to remove selected or all content.
NOTE - if you wish to delete a publication completely, please see the guide Deleting A Publication
Navigating to the Files section of a digital publication will show a list of content uploaded specifically to use here:
Delete - To delete content, select the Delete icon to the right of the file you wish to be removed.
Bulk Delete - To bulk delete content, select the check boxes next to each file you wish to remove, then select the bulk delete button in the top right hand corner.