Go to Events/Sessions > Categories
Click on the 'Add New Category' button
Enter the required fields and click 'Save'
Close the window once the new category has saved successfully.
Add New Subcategory
If you are adding a new Subcategory, follow the steps above and then click 'Edit' next to the primary category
Click on the 'Manage Subcategories' button
Add the available Category and click 'Save' to update your changes