You have to open the file with the appropriate program because the SDOC file is a proprietary format. Usually you can export the content of the PDF file directly in the application. Alternatively you can create a screenshot.
Option A - Content of the SDOC file can be exported as a PDF file.
- Open the SDOC file and the content which you want to save as PDF.
- In the app go to File -> Export or Menu -> Export and create a PDF file.
Option B - Create a screenshot as a JPG file.
- Open the SDOC file as usual and navigate to the content which you want to save as PDF.
- Take one or more screenshots.
The created screenshot files can be converted and merged to a PDF file. Furthermore it is possible to create a searchable PDF in order to copy text.
If you have already exported a PDF file, you can merge multipe files and compress the PDF or extract certain pages:
Convert files to PDF