Comment 3 for bug 1165960

I finally solved this..

 {'fields': {'Color': '#FF0000',
                     'Font': '/usr/share/fonts/dejavu/DejaVuSansMono.ttf',
                     'Horizontal Justification': 'Right',
                     'Horizontal Offset': '100%',
                     'Orientation': u'Normal',
                     'Size': u'3 %',
                     'Position': u'Custom',
                     'Text': u'<Pexif_DateTimeOriginal>',
                     'Vertical Justification': 'Bottom',
                     'Vertical Offset': '100%',
                     '__enabled__': 'yes'},
          'label': 'Text'},

Documentation could be much clearer!