| $album_directory | The relative path to the directory in which the pictures are stored. |
| $thumb_directory | The relative path to the directory where the thumbnails are created. |
| $thumb_height, _width, _quality | Define the maximum dimensions of a thumbnail. The thumbnails don't lose the aspect ration when scaled down. The quality is a number between 0-100 (100 is best quality). |
| $rows_per_page, $pics_per_row | How many rows and columns should the thumbnailview have. |
| $show_filenames_with_thumbnails | Show the filennames under the thumbnails? Can be true or false. |
| $max_picture_height, _width | Here you can define the maximum size of the pictures that will be shown. If the original picture is bigger than these values it will be scaled down and a link to the fullsize picture will appear under the scaled down one. Very usefull, if you want to make sure that the picture fits into the browser-window. |
| $standard_style | The name of the css-file you want to use. |
| $language | Defines which string.inc should be included. Set to 'en' to include 'string.en.inc'. Note, that this setting is should not be taken for granted. If the user configured his browser to get some other language, and you provide the right strin.*.inc then this language is used. |
| $pic_extensions | Defines, what types of files should be displayed as thumbnails |
| $other_extensions | What other files should be displayed through default thumbnails? |
| $gd_available | Select which version of GD is enabled on your web server: 0: no GD at all; You have to create the thumbnails by yourself 1: GD 1.x; Not so nice thumbnails 2: GD 2.x; Nice looking thumbnails (default) |
| $thumb_map | This option maps the filetypes to the default thumbnails. |