When I want to print an entire workbook as one document, I normally choose
File, then print, and then choose Entire Workbook, and the entire workbook
prints as one document (sometimes I use a pdf writer, and this turns the
workbook into one document).

I have one workbook which is printing each worksheet separately. Does anyone
know what would cause this behaviour? I've never seen it before, and it has
me stumped.

Thanks very much!