Tolomeo is used in the preview in the Resource details page only for “WMS getMap” resources. A site-specific preset is loaded in Tolomeo, and the WMS layer is then added to it.
The local Tolomeo instance can be recalled from the main page, following the link “Go to the map client”. The default preset can be defined in a site-wide configuration.
Furthermore, when viewing Resource details of a WMS getMap resource, you can display the layer in the full-featured standalone Tolomeo client using the upper right button (see Spatial resources).