From LongJump Support Wiki
Required fields are highlighted to indicate that data input is required. If a Required field is empty and an action is taken on the record (Edit and Save for example), an Error Message is displayed. To change the attributes of a field, see the Display Attributes section in Edit Field Properties.
|Required fields are highlighted with a green bar to the left side of the field.|
|Fields without a highlight are optional|
- Checkbox fields are not eligible as Required fields