My application has a 'templates' and a 'dashboards' pages. In the first one user can create dashboard templates containing charts, in the second one he can select a template and apply filters on it to display dashboards using his data.
In the template creation I use fake data in charts so the user can have a preview of how it will look like in dashboards. The problem is users tend to believe they are directly seeing their real data in the template page.
I wanted to add a 'PREVIEW' watermark on each tile of the template. Is it relevant or is there a better solution?