$conf['batch_download_max_elements']
Maximum value of the Maximum number of photos per download set slider.
Default is 1000.
$conf['batch_download_max_size']
Maximum value of the Maximum size of each archive slider.
Default is 500.
$conf['batch_download_additional_ext']
Array containing downloadable file extensions (case sensitive).
Default is $conf['picture_ext'].
$conf['batch_download_file_pattern']
Pattern for filenames in the archive. Available fields are '%id%', '%filename%', '%author%', '%dimensions%'
.
Default value id %id%_%filename%_%dimensions%.