Oh, and yeah, you can't 'open' multiple types of files at once since they would not all 'open' in the same software. I suppose you could make a feature request to Microsoft to add that capability, it ...

The Preview pane in File Explorer helps us preview several file types. Therefore, finding it just displays some random text and no preview of the desired PDF file can be somewhat problematic. A ...

If your Windows 64-bit installation doesn’t show thumbnail images of PDFs, you can use the free 64-bit Adobe Preview Handler to make it work again. When I upgraded to Windows 8 64-bit a few months ...

Unlike other browsers, Firefox only uses internal settings to select a PDF viewer. Open the "Firefox" menu, click "Options" and open "Applications." Scroll down to "Portable Document Format (PDF)." ...