Attaching documents in chat feature during live webinar

During a live webinar, when attaching a PDF in the chat feature, the attendees are prompt to download the document before they can view.  Is there a way that the attendees can view the document as opposed to downloading it first?  The option to view is only available after downloading.  I reviewed and confirmed my settings are set correctly as the host.  I am looking for a similar process like on a WebEx platform- Attendees can click on the attachment and it will open to be viewed. The attendees can then decided to save the document.