Can you show us an example of what you would expect to see?
When you are in an "Edit" mode, the line will look similar to what you have. However, if you go to Open->Overview-><your map>, they *should* look differently (as expected).
FYI, NagVis is not developed or maintained by us. We just provide a NagVis-Nagios XI integration. You may get a faster resolution to your issue if you posted your question on the NagVis support forum.
Be sure to check out our Knowledgebase for helpful articles and solutions!
Ok so i managed to actually get most of the options to show the bandwidth numbers.... the last option on the list java crashes Nagvis though... Ill ask on their forums