How to OPEN rather than DOWNLOAD (??)

How to OPEN rather than DOWNLOAD (??)

Hello from faraway New Zealand
I am trying to add a link to a PDF document from a Notes field on a form. It is a print version of the form in PDF format. This is something the client has asked for.

Unfortunately, the file downloads rather than opening.

This is the URL format I am using for the link:
https://creatorexport.zoho.com/workingwise/pacrad/KeyDocEdit/654604000011936102/File_upload/download/1473212208812_PRG_Induction.pdf

Can somebody please tell me how I can amend this URL so that the document OPENS?

PS The link above is just an example - it won't download anything. Just looking for the revised syntax.