Thanks for this, Emma.
Perhaps I am not being sufficiently clear about what is happening, so let me go through the steps:
Scenario 1:
1) I display the assignment with its grading summary
2) I click on View all submissions
3) I click on Grade for a row where the status is Submitted for grading (I should note that the display of the submission in the rightmost column is so narrow as to show only the first character on each line, making it completely worthless, but that is a different issue - see screen shot capture3.png)
4) The new page shows a large area on the left with the message "Generating the pdf..." and a somewhat smaller area on the right containing the online submission. On top of it all is the message "Alert. Cannot open the pdf..." (see capture2.png)
Now, it is true that I can click on an icon at the lower right to hide the left side, but I have to click on OK to hide the alert and click on the icon for every single submission. It seems to me that Moodle should not try to retrieve a pdf and display if the assignment is configured to accept only online submissions and it should not display an alert when it fails to do what it was never meant to do in the first place.
Scenario 2:
1) I display the assignment with its grading summary
2) I click on Grade.
3) Moodle displays the same two sections as above. for a student's submission, although it shows the records for all rows, not just the ones that have been submitted. While I can change the filter afterwards, why do I have to do this every time? If you are grading, wouldn't it make more sense to list by default the submissions that are ready for grading (or whatever default filter you want)?
table.
