To add a draft watermark to a dashboard, you should use a sheet as a type of object. A sheet is a worksheet that contains a chart or a table that you can add to your dashboard. You can create a sheet that shows the word "Draft" as a text mark and format it with transparency, size, and color. Then you can drag the sheet to your dashboard and position it behind your other sheets as a floating element. You can also adjust the opacity and layering of the sheet to make it look like a watermark. Reference: https://help.tableau.com/current/pro/desktop/en-us/dashboards.htm https://help.tableau.com/current/pro/desktop/en-us/dashboards_create_layouts.htm https://help.tableau.com/current/pro/desktop/en-us/dashboards_create_watermarks.htm