I'm a developer that's set up some Tableau integrations for some analysts that I work with.
I've got embedded Tableau work books in my Portal web app, and custom buttons to pull up the Image and PDF Export.
One thing my analysts would love to have is for there to be a logo applied to the Image and PDF Export results.
Putting that onto the regular embedded workbook isn't an option however, because that would leave the embedded page overly cluttered.
Is there any mechanism within Tableau to do customization purely for the printed/exported snapshots?
This thread seems to have a workaround that might work for you:
Custom logo on Exports and printing
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