On the Categories page in Settings, you will see a list of all existing Categories and their details, as well as be able to create a new category.

Uncategorized is the default category. 

Its default weight is 1. Its details can be edited like any other category, but it cannot be deleted. If you do not want to use the Uncategorized category, please create other categories and make sure to move any existing assignments to the correct categories (this can be done via Edit Assignment).

Category Weighting

Category weighting, similarly to assignment weighting, determines what value a category of assignments has in relation to other categories. Category weights are similar in function to assignment weights; the higher the weight of a category, the greater worth the assignments in that category have, collectively, towards a student's cumulative grade.

Total Weights

Similar to assignment weights, the total category weight also does not need to equal 100. Cumulative grades will always be calculated as a percentage of the total category weight.