How to sort the assignments in Grade book into columns

In case you have too many columns i.e. assignments in the Grade book, use categories (without weighting) to simplify the view.

Categories help you to group more assignments into one column. For example, let's create a Homework category to group all grades from homeworks. Or let's create categories for Tests, Oral Exams, Projects etc.
Different categories can have different backround color.

You can create and manage the categories via Settings/Settings of categories.

Select a category to sort the assignment into, when creating an assignment.

To group the grades into categories, set "Group assignments by categories" in the "Show" menu.