using image capture how do I scan multiple pages to send by email?

I do not see the check box for "Combine into single document" in the scanner control window. There is nothing anywhere I can find that indicates how to add another page to a scanned document.

Are you showing the details? There is a button on the bottom, right.

Are you looking at a window on the scanner or in Image Capture?

Choose an output format that supports multiple pages, like PDF or TIFF, and check the box to combine into one document: