Within Teamwork Desk, you can choose to enable or disable individual custom fields at anytime.
Note: Custom fields are available on Premium subscriptions and above.
To do this, click your profile icon to the top right of the navigation bar and select Settings.
In the settings area, go to the General tab.
Note: Only site administrators can access and update custom fields.
In the left pane select Custom Fields.
You will then be presented with a list of your existing custom fields.
To enable an existing custom field, toggle on (green) the option in the Enabled column.
To edit the settings for an existing custom field, hover over it and select the edit pencil.
To remove a custom field entirely, hover over it and select the trash can icon to delete it.
For more information, see: Adding a New Custom Field