Viewing documents will always display the document as an image, regardless of what setting is configured in the users preference under "Set Display Document as PDF or Image".
To replicate:
- Click on user on top right of schedule view
- Navigate to setting "Set Display Document as PDF or Image"
- Open up echart and navigate to open a document from the document module
- Note that document opens up not as an embedded PDF, but as an image.
Image view:

What embedded PDF view should look like:

Viewing documents will always display the document as an image, regardless of what setting is configured in the users preference under "Set Display Document as PDF or Image".
To replicate:
Image view:
What embedded PDF view should look like: