Calc/Drafts/Page margins

About adding a new feature that "page margins on page preview of Spreadsheet"

This function can be described as follows:

According to the request of the to-do list for the spread sheet in OpenOffice.org community, the feature is to add resizeable margin on page preview in Spreadsheet, in the page preview, add the possibility to interactively change page margins by dragging an indicator, instead of using the page style dialog.
Add resizeable margin on page preview. so we can easily formating the documents when we need to print.
the Specification of this new feature