Moodle's grade book enables you to arrange items in your grade book, add columns and categories, and customize how students' grades are calculated. To control these features, go to the Views section beneath Categories and Items in the grade book drop-down menu:
Simple view allows you to control the order of items and categories in your grade book, set the relative weight of a category as part of the final grade (for weighted average), and set the method used to calculate grades for categories and the overall course.
Full view contains the same options as simple view. Additionally, you can change advanced grading options for multiple assignments at once.
Note: The image below is of Simple view.
(Click to enlarge)
To record grades for offline activities that you want to factor into your grades, such as quizzes or exams, you must first add a column to your grade book be creating a new grade item. Adding a grade item does not add a corresponding activity for your students to submit (e.g. an online activity/assignment). Data can be added to this column manually or by importing a spreadsheet. For instructions, refer to Import Student Data into Moodle.
To change the order of columns in the grader report, you must be in Simple/Full view. Each grade category and grade item (equivalent to a column in the grader report) has a up-and-down arrow icon next to it. Clicking this button triggers the move action.. The element to be moved is highlighted and the word (Move) appears next to it. Rectangular boxes preceded by an arrow appear in places where you can move your selected item or category.
You can also move multiple grade items at once using the check-boxes located in the right-most column. (Click image for larger view)
If you find that you want to delete a column or category in your grade book, first go into either Simple or Full view.