Paying fees with BXY is easy, and can offer discounts on trading when you reach certain user levels. To activate this feature, click on the Settings icon in the upper right corner of the Trading Page.
This will open a pop-up window. The first option is Pay with BXY. Simply click on the slider to the right to turn this feature on or off.
If you are interested in learning more about the BXY token, you can find an article that elaborates on the token and its utilities here.