Powerpoint+pdf+conversion

I had some difficulty trying to figure out how to savmy powerpoint as a pdf, to send through blackboard since I don't have a pdf write. After some research, using the F1 key I found a link to Microsoft, and they have a download that will allow you to publish as a pdf. Follow the instructions, then when you click in the upper left hand corner to save, save as, and there will be a choice for pdf.