For example, do you want to save a July version of the workbook, that
will always contain the data and chart for that month? If so:
1. Choose File>Save As, and save the file with a new name,
e.g. 200307Chart.xls
2. Select all the data, and choose Edit>Copy
3. Choose Edit>Paste Special
4. Select Values, click OK.
This will disconnect the data from the source that is updated, and the
data and chart will remain as they were in July.