Go to the main menu and you will see the Settings option. Select it. After selecting the Settings option Select Contract from Modules option, here, you will find an option to set category for Contracts. Select this option. After selecting the option, You will see a list of categories already added for a Contract on the screen If no categories are created yet you can create a new category from here. Click on Add contract category button. A popup with a Textfield and a Save button will appear. Create a category and click Save button. Newly created category will be seen on the list.