This video demonstrates how to customize your gradebook.
This video demonstrates how to view all grades for one student at the same time in a single course. Written step-by-step pages can be found on the Gradebook, SpeedGrader, Attendance tab.
This video explains how to view a student's most recent submission and any older submissions they may have turned in on one assignment.
Canvas allows students to enter hypothetical grades into their gradebook. You may want to let your students know about this feature to save yourself some time. The video below demonstrates what this looks like using the Student View feature.