I looked around for the answer and couldn't find it exactly in the boards.
I am in Tableau 10 and have an issue with connecting my Primary data source on one worksheet with my secondary one on the other. So my only solution seems to be to set up some Parameters like one would have had to before the T10 update.
I'm fine with that solution, but really hate that I can only select a single item, because that significantly decreases the power of my Dashboard.
Is there any fancy workaround so that I can set up a Parameter to filter across all my graphs, where I would be able to have a multiple selection? (outside of obviously just having a dropdown for every combination possible, but that is just madness).