If the program you are working on does not have an option to save as pdf then here are a few options that might help:
Install a simple pdf printer option
Use a simple little utility: Bullzip PDF Printer that creates a pdf printer that you can print to from any program.
You can download this program here: http://www.bullzip.com/products/pdf/info.php
When installed it will add another printer called Bullzip. In your program that has the document (or picture) choose print and select the the Bullzip printer. It will then give you options to save as pdf.
Use a free online pdf convertor
You can also upload your file to an online convertor that will convert it for you to download.
One such example is https://www.freepdfconvert.com/ which also gives you other format options like jpg and tiff.
Use Google Drive to download as pdf
If you are a Google Drive user then you can upload your document to Google Drive. Then when viewing it you can choose to Download as PDF.
Download the document as a PDF. Click File → Download as → PDF Document (.pdf). Depending on your browser settings, the download may begin immediately or you may be prompted to choose a download location.
PDF Files Meet Legal Document Requirements
Because a PDF document is a “read only” document that cannot be altered without leaving an electronic footprint