Blank reports are displayed on the Select Report page of MAST. They can be used as a starting point when designing a new report from scratch.
A blank report is provided for each data cube. Each blank report has a single default category (generally Date) and a a default measure. Blank reports do not initially have any series or filters defined.
If a report based on a blank report is saved but not named, then it will appear in the Select Report page with a default name which can be edited at a later stage.