Spade Admin can add custom fields for your requirements and stories. Go to "Space Management" and select "Customizations" in the left-hand menu. Then select the "Fields" tab at the top. Switch to "edit" to manage custom fields.
After switching to edit mode, you can create a new custom field by selecting either requirement or story in the list and clicking on the "Add field" action button. You can also remove existing custom fields, change them to be required or not (whether you can create an item without filling this field), and rearrange their order on the right panel.
Elements supports six types of custom fields:
After you create a new custom field, the new data is added to all existing requirements or stories immediately. It is also added to requirement and story reports.
If you decide to delete the custom field, simply click on the "x" against the field in the right panel. You will need to confirm, as deleting the field will delete the stored data on all records using it.