service.thumbnail
Background
| this option is deprecated. The thumbnail API should be used to manage thumbnails. | 
Specify the path to a thumbnail image for the results page, which is
interpreted as a path relative to
$SEARCH_HOME/conf/SEARCH_PACKAGE_ID/RESULTS_PAGE_ID/.
This may be any image file the browser is capable of rendering, and will be resized on the client. To avoid unnecessary bandwidth usage, the image should not normally be larger than 500x500px.
Setting the key
Set this configuration key in the results page (preferred) or search package configuration.
Use the configuration key editor to add or edit the service.thumbnail key, and set the value. This can be set to any valid String value.