The order of assignments in the grade book can be rearranged to minimize scrolling.
In the left sidebar, click the Grades
Click the "Categories and Items" tab
Select item to move
You will see a list of the assignments in the grade book with icons next to them. Click the green "move" arrows for the assignment or folder of assignments you wish to move.
Click on the place you want to move the item
Click the box in the location where you want to move your item. When the page refreshes, the assignments should be in their new order. This will be the order reflected in the grade book.