As yesterday's post has been overtaken by today's full release, I have had a go at solving this niggle myself. In effect, I have amended the file /include/config_default.inc.php with the following lines in the /local/config/config.inc.php ;-

<?php
// use_iptc: Use IPTC data during database synchronization with files
// metadata
$conf['use_iptc'] = true;

// use_iptc_mapping : in which IPTC fields will Piwigo find image
// information ? This setting is used during metadata synchronisation. It
// associates a piwigo_images column name to a IPTC key
$conf['use_iptc_mapping'] = array(
  'keywords'        => '2#025',
  'date_creation'   => '2#055',
  'author'          => '2#080',
  'name'            => '2#005',
  'comment'         => '2#120'
  );

?>

My suggestion is that these changes be considered to make the configuration/display page effective for new users. It would be useful if a help button was added to the effect that is these buttons are set to true, any existing images will have to be resynchronised for the database to be populated.

I have carried out these checks on my test site which is upgraded to the full release of 14.0. I have also successfully upgraded my live site and am absolutely delighted with the results. Thank you for a very worthwhile upgrade.

Thanks for your clarification, erAck. I have followed your advice and can see the benefits in the data. This is an important change as I rely on the date & time in the default sort order within albums. This is because my wife and I are both keen photographers and we both use our own cameras and phones to capture our images. So sorting by file name does not organise our photos into chronological order.

I am beginning to see that there can be no one-size-fits-all for the config_default.inc.php file. So I think that my configuration findings would be better directed at the documentation. For what it is worth, these are my current settings...

<?php
// use_iptc: Use IPTC data during database synchronization with files
// metadata
$conf['use_iptc'] = true;

// use_iptc_mapping : in which IPTC fields will Piwigo find image
// information ? This setting is used during metadata synchronisation. It
// associates a piwigo_images column name to a IPTC key
$conf['use_iptc_mapping'] = array(
  'keywords'        => '2#025',
  'name'            => '2#005',
  'comment'         => '2#120'
  );

$conf['show_exif_fields'] = array(
  'Model',
  'UndefinedTag:0xA434',
  'FocalLength',
  'COMPUTED;ApertureFNumber',
  'ExposureTime',
  'ISOSpeedRatings'
  );

?>