To print a document to PDF on Windows, please open the document outside of Zylpha in its native application. In the example below we are using Adobe Acrobat to open a PDF, the print options may look different when using a different PDF viewer.
With the document open, please select "Print". This is usually found after clicking File > Print.
This will open the print options. Here, select "Microsoft Print to PDF" as your printer.
You can then select the page range you wish to split out of the source document and select "Print". In the example below, we are splitting pages 50 - 100 out of the source document.
After clicking "Print" you will be prompted to select a save location for the extracted pages, which you can then upload to Zylpha.