AFAIK, that button is only available if your using an OLAP cube as the
source data.

For other sources, you can include hidden page items:

Right-click on the pivot table.
Choose Table Options
Add a check mark to 'Subtotal hidden page items'
Click OK

TC319 wrote:
I have set up a pivot table that lists only the Top 10 values in a column,
but also want the subtotal for the entire column, including the hidden items.
Excel Help tells me that I can click the "Include Hidden Items in Totals"
button, but the button is not available. I followed the help instructions to
first select "Subtotal Hidden Page Items" then to unselect it and didn't get
my result in either case. Any ideas on why the button is not available?



--
Debra Dalgleish
Excel FAQ, Tips & Book List
http://www.contextures.com/tiptech.html