This just isn't working in Excel 2010. I am trying to access the "Number Format" options within the Field Settings option on a field that I have placed in the Column Labels box. I have ensured that, 1) autofit is off, 2) preserve formatting is on, 3) blank cells removed in data table, 4) no data formatted as text in data table. There is text in the data table, but it is formatted as General number format. I have another pivot table that is essentially identical that does have the option and works as desired. The problem is, when choosing another selection in the slicer, all of the numeric data that I have formatted as "Number/with Comma/No Decimals" reverts back to general. This is ridiculous and maddening. Can anyone help?