Hi,
if you want data on map links, right click on a link, select "Properties", then "Data sources", and add DCIs you want to display on that link.
Best regards,
Victor
3.1 packags for raspbian buster have been released. Installation by installing https://packages.netxms.org/netxms-release-latest.deb in not working yet, so it's necessary to manually add
deb http://packages.netxms.org/raspbian/ buster main
into sources.list