How to edit draw.io flowchart

Arun John_fmt1l6

I have added a flowchart into a Confluence page using "Embed draw.io diagram". When I try to edit the flowchart, I am not able to do that. I clicked on the pencil icon and a page opens up; but not sure where should I go to edit that. Attached a screenshot of what I am seeing

unknown

Embedding means the diagram is embedded from another location. Search for that diagram by name in the Confluence search to find the page the diagram exists on. Then, edit the diagram there.