When I export an InDesign document, it exports to PNG instead of PDF. not sure if I changed a setting or something by accident, but I'm not even given an option of exporting to PDF. HELP!!!
When you choose Export, you should get a dialog that looks similar to the Save one.
At the bottom there is a drop-down menu for choosing the format. It's sticky, so if you once export to PNG, you will have to change the next file back to PDF.
That solution was so obvious I'm actually embarrassed I didn't figure it out myself. thanks!