I am looking for a good way to display metadata for each of the charts/indicators I am displaying within my dashboard. The data that is displayed was collected from different sources and I would like the user to be able to check where the data is coming from. I tried to add the source as a description but it takes too much space vertically. In the screenshot you see that I added the sources in the right lower corner but then it is difficult to see which data is coming from which source. It would be great to have something like a small info button for each item to show the meta data in a small popup or similar. Or to show the metadata in description but only when the chart is enlarged.
Any idea to make this as user friendly as possible and still save as much space as possible?
Thanks for your input!