Sierra / Mail.app workaround for missing "Display in Place / Display as Icon" choices? The "Display in Place / Display as Icon" choice in Mail.app (accessed via a right-click), previously removed from High Sierra, has now also disappeared in Sierra running Mail.app 10.3. 

Is there a workaround? I have a 160K one page .pdf attachment that I'd like to display in full.
A successful workaround is displaying the visa on your computer, taking a screenshot (command + shift + 4) of the image, and attaching the screenshot to the email. In this case, the screenshot displays fully, showing the image within the email.