It would be nice to inline PDF files similar to images. I am not aware of a WYSIWYG way, so I tried embedding in ways I've done in other forms using the following code. Unfortunately, when used here, hoopla turns it in to a Macromedia Flash Movie Player.
<object type="application/pdf" data="https://ogrforum.com/fileSendAction/fcType/0/fcOid/38737270294694459/filePointer/38737270410254982/fodoid/38737270410254978/How%20To%20Operate%20Lionel%20Trains%20and%20Accessories%20%201954.pdf" width=500 height=330 scrolling=no><embed src="https://ogrforum.com/fileSendAction/fcType/0/fcOid/38737270294694459/filePointer/38737270410254982/fodoid/38737270410254978/How%20To%20Operate%20Lionel%20Trains%20and%20Accessories%20%201954.pdf" type="application/pdf" width=500 height=330 scrolling=no></embed></object>
