crystal report design - display pdf

i am trying to display a pdf in the report without having to click on it for hyperlinking. for example, i have multiple invoices that each require documentation that are scanned as a pdf. i have created hyperlinking but the user does not want to click on the link. the image should just display for every invoice it belowgs to; i am able to do tiff and jpeg. i have a file path set in the picture settings for location. why does pdf not display without clicking?