If student names are displayed in SpeedGrader, the default is first name, last name. When a student has a particularly long first name or names, there is not enough space for the last name to be displayed.
This causes problems for graders who need to identify specific students' work when marking. It is possible to click the drop down and view the student's full name, however it would be much more convenient to be able to choose for the last name to be displayed first. This option is already possible in the Gradebook, please make a similar option available in SpeedGrader.