Login, navigate to the page with the existing element that you want to remove, and choose "Work on this Page" or "Work on this Page (All Changes)."
Click on the element properties icon () for the existing element that you want to delete; click on "more."
Select "Delete..." from the pop-out menu.
A dialog box prompts for confirmation.
Click "Yes" to delete the selected element; observe the resulting yellow work-in-progress icon, with the overlaid minus sign, indicating a pending deletion of that element. There will also be a yellow work-in-progress icon for the containing layout element (table or container), with a curved arrow, indicating the pending modification (by removal of one of its parts).
Click on the yellow "Work-in progress" icon to publish the change. If you change your mind at this stage, you can select "Discard Changes"; you may need to do that twice, once for the element and once for the containing layout element.
Select "Submit Page," because of the multiple elements affected by the change.
Type the comments in the dialog box.
In class, wait your turn to click on the "Submit" button.