Option 2: A-PDF Password Security can be used.
- To enable copy/paste on a PDF file in simply three steps, use A-PDF Password Security:
- Select 'Single PDF Document Security' from the drop-down menu and click 'Next >.'
- Copy/paste will be enabled when you click the 'Browse...' button to open a PDF file.
- To allow copying permission in the PDF file, check 'Enable Copying of Content' and then click 'Save' or 'Save as...'