The automatic download of PDF on clicking “View PDF” is controlled by your browser settings, not by Swipe. To change this behavior:
If you are using in Chrome Browser, Navigate to Chrome’s settings, then select Privacy and security, followed by Site settings, and then PDF documents. From there, you can choose whether to open PDFs in Chrome or download them automatically.
If you’re using Mozilla Firefox, Navigate to the Applications section in the settings. Find the “Portable Document Format (PDF)” entry and choose your preferred viewer from the “Action” dropdown menu.