For competencies already in your Skills Matrix, click directly on the competency you want to add/edit the category for
Click on the category dropdown menu in the pop-up window to select a different category and then "Update".
To create your own custom category, click “Create custom category”, type the name of the category, select “Create” and then “Update”.
Be sure to save your matrix in the bottom right of the page
All of your custom competencies that belong to a custom category can be found under “My custom competencies” in the competencies library.