A, B, and C are my three data sources. Proxyid is a field that appears in all three of them. Due to the use of sophisticated computations, I am unable to mix them. Using these data sources, I constructed three spreadsheets in total. With these three spreadsheets, I'm making a dashboard. I'd want to utilise proxyid as a single filter that can be applied across all three spreadsheets.
However, I presently have three proxyids as filters, one for each worksheet on the dashboard. How can I use a single filter to apply to all three worksheets?