In Page view, on a stacked page, click the plus
Add button 
on the control bar.
To add a new record to internal data, you create a new stacked page. Each new stacked page has the same layout of data fields and non-data objects as all the other pages in the stack.
You can create as many new stacked pages as you want. For each new stacked page, NetObjects Fusion adds a row to the data list on the data list page. You can delete stacked pages for internal data whenever you want.
Note:You cannot add or delete stacked pages associated with an external data object. To add or delete records when data is stored externally, you must update your external database or spreadsheet application and re-publish your site.
To add internal data stacked pages:
In Page view, on a stacked page, click the plus
Add button on the control bar.
A stacked page with blank data fields appears. The counter on the control bar indicates the new total of records in the stack.