In order to use PDF-2-FLOW, the resolution quality (DPI) of your PDF invoice should be at least 300 DPI (Dots Per Inch). Here's how you can check this using Adobe Acrobat.
1. Open your invoice with Adobe Acrobat.
2. Click File, then Print.
3. A dialog box will appear (shown in Dutch, but the process remains the same regardless of language). Click Advanced.
4. Another dialog box will appear where you can see the DPI of the document. If it is a digitally native PDF document (not a scan), you can adjust the DPI if necessary to ensure that it is 300 DPI or higher.
5. If you have adjusted the DPI, click OK and select Adobe PDF as the printer. Then click Print to save.