Shown in Video:
After completing your diagram, exporting the document is a critical step to complete the process. As you press Export as PDF, you are presented with several options to customize how the PDF will be exported. As shown in the video, you can alter the scale, paper size, grid display, and many other aspects.
Using this option screen can allow you to export the drawing in any number of ways, whichever is best for your use. To complete your drawing process, simply press "Export" and you'll have a completed PDF of your drawing to email, print, etc.