• Install version 2.8.3 (http://piwigo.org/)
• Configuration
  • Plugins: install and activate
    • Admin Tools - UNcheck open toolbar by default
    • Batch Downloader
    • Batch Manager, Photo Description
    • Download by Size
    • Download Permissions
    • Exif View
    • Export Data
    • GThumb+ - Number of photos per page: 20 / Scale thumbnails: Resize
    • LocalFiles Editor
    • Read Metadata
    • Rotate Image
    • RV Thumb Scroller
    • SortOrders
    • Write Metadata
  • Themes
    • Deactivate Smart Pocket (Mobile)
    • Install, Activate and make Default: Bootstrap Darkroom
      • Configuration
        • Default: Social integration: UNcheck Enabled
        • Extra: Thumbnail page display - Link thumbnail to Photoswipe Slideshow (Mobile devices only)
  • local/config/config.inc.php

<?php 
$conf["show_exif"] = true;
<?php 
$conf["show_exif"] = true;
$conf["use_exif"] = true;
$conf['show_exif_fields'] = array('ImageDescription',
                                  'Make',
                                  'Model',
                                  'DateTime',
                                  'COMPUTED;ApertureFNumber');
$conf['use_exif_mapping'] = array(
  'date_creation' => 'DateTimeOriginal',
  'name' => 'ImageDescription'
  );
$conf['show_iptc'] = true;
$conf['use_iptc'] = true;
$conf['use_iptc_mapping'] = array(
  'keywords'        => '2#025',
  'date_creation'   => '2#055',
  'author'          => '2#080',
  'name'            => '2#105',
  'comment'         => '2#120'
  );
?>