You must have admin rights in your instance to enable this functionality.
1. Click on your name in the bottom left corner to open your action menu.
2. Click "Global Settings"
3. Click "Work Orders"
4. Click "Categories" or scroll down to your category table.
5. Click on the category you wish to enable this feature for
6. On the General Info tab of your category settings you will find a toggle for "Require Image"
7. Once enabled make sure to click "update" to save changes.
8. Click the X in the top right corner to exit.
9. Once enabled, users will be required to upload an image or attachment before they can submit a work order or work order request, when using the enabled category.