Embed Object and fields added to document - what are they used for?

I have embedded an Excel spreadsheet onto a Notes Document Form which always says “This document is ready-only.”

Fields are:

Author = “IBM_USER”, Text

Company = “IBM_USER”, Text

LastSavedBy = “IBM_USER”, Text

LastSavedDate = [Date is was created], Date/Time

LinksUpToDate = 0, Number

NameOfApplication = “Microsoft Excel”, Text

ScaleOrCrop = 0, Number

Security = 0, Number

Worksheets = “Sheet 1”, “Sheet 2”, “Sheet 3”, Text List

Is “Security” the field I should change to make the Notes document not read-only?

Thanks!

Dan