I’m really appreciating the Qlik Sense Mashup facility. In the simplest case, mashups are when you embed Sense charts in a web page. Super easy with Sense.
Perhaps you’ve created some charts in your app that exist solely to serve the mashup. What if you want to display these charts in the mashup but you don’t want them showing in a sheet when the app is viewed via the hub?
How to make these charts available to the mashup but not appear in the “app”? Simple. After creating the chart, make it a Master Visualization and then delete it from the sheet. The mashup can use the Master Viz Id to reference the object.
If you are using the Dev Hub Mashup editor, note that Master Visualizations appear at the top of the “Sheets and Objects” list, before the first Sheet.