Select the Gradebook tool from the Tool Menu in your site.
After you have added items to your gradebook, you will be able to view a list of all gradebook items on the Grades tab (which is also the tool landing page).
If you have categories and your gradebook and the Group by Category option is enabled, each category will be color-coded and you will also see the category averages displayed at the far right of each category.
Notice that any items which are coming from Assignments or Tests & Quizzes will show a grayed out padlock icon in each cell and will also display the tool icon in the column label. Graders will not be able to enter or revise grades manually in these cells.
Any items not included in the grade calculation will display a crossed-out calculator icon.
Any items which are not released (visible) to students will display a crossed-out eye icon.