Under the "Printer" dropdown menu, select or "Save as PDF."
While you cannot "convert" a file inside the free desktop Reader app, Adobe offers several workarounds and free online tools that get the job done. How to Convert to PDF for Free (Using Adobe Tools) adobe reader convert to pdf free download
A free, open-source office suite. You can open almost any document and click "Export as PDF" instantly. Under the "Printer" dropdown menu, select or "Save as PDF
Use the Adobe Acrobat Online converter.
The Ultimate Guide to Adobe Reader: Can You Convert to PDF for Free? Under the "Printer" dropdown menu