Hello,
just a quick question is there any why to change the size of the Diagramm definition,
it goes over the edges. I only found out that u can change the visual form. Is there any way do this?
Can you link to the exact panel plugin that you are using? There are multiple diagram panels available in Grafana 
Hello,
here is the link :
so that is a third-party plugin. Your best bet would be to make an issue in that repo. But it looks like the repo is getting old, so I might consider finder a better maintained diagram plugin instead: