When an index is created, its automatically generated header will contain the thumbnail image for the directory (if a thumbnail file exists). In addition, each link to a subdirectory which contains a thumbnail will display that directory's thumbnail next to its link.
The recommended size of a thumbnail is 100×66 pixels, but any size that will fit in the index is allowed. If the height of the thumbnail exceeds 150 pixels, it will not be displayed in the automatically generated header.
tn_filename_ext.gif"
or "tn_filename_ext.jpg", where
filename is the base file name of the slide image file (without the extension), and
ext is the file name extension. For example, a GIF thumbnail for "myslide.jpg"
would be "thumbs\tn_myslide_jpg.gif".
ImajSite will automatically create thumbnails for all JPEG images in the current directory if a "thumbs" subdirectory exists in the directory being built. If images are removed from the current directory, the corresponding thumbnails will be deleted the next time the directory is built. The default size of slide thumbnails is 100×100 pixels (maximum), but this can be changed in the configuration file.
Slide thumbnails will only be displayed if the index format supports them. Currently, only explicitly formatted or combined indexes support slide thumbnails.