You should provide a list of Categories to your Project Manager when setting up the Exhibitor Ready Room; however, you can add, edit or remove Categories once your site is live.
ADD A CATEGORY
Go to Exhibitors > click on the 'Categories' link

Click on the 'Add New Category' button

Enter the required information and click 'Save'

ADD A SUBCATEGORY
Follow the steps above to create a Parent Category and Subcategory (they will not be related yet)
Refresh the list of Categories to find the Parent Category Name

Click on the 'Manage Subcategories' button

Check the box next to the appropriate subcategories and click 'Save' at the bottom of the screen

EDIT A CATEGORY OR SUBCATEGORY
Go to Exhibitors > click on the 'Categories' link

Click on the Category name you want to edit

Edit the appropriate information and click 'Save'

REMOVE A CATEGORY OR SUBCATEGORY
Go to Exhibitors > click on the 'Categories' link

Click on the Category name you want to remove

Change the 'Status' field to 'Inactive' and click 'Save'
