GeoServer enabled users to set custom display for feature info. Read this and this for more details.

Here i’m just telling where to add the custom display.

Please add ‘content.ftl‘ for the following under GEOSERVER_DATA_DIR/workspaces/…

1. Feature type specific template:
   • <workspace>/<datastore>/<featuretype>/content.ftl
2. Store specific template:
   • <workspace>/<datastore>/content.ftl
3. Workspace specific template:
   • <workspace>/content.ftl
4. Global:
   • content.ftl
5. GeoServer classpath and load the default template