Validate in Adobe Interactive Forms (HCM)

Hi,

Good day to everybody.

Service is create in HCM. Form scenario and ISR scenario is complete. This is configure in SPRO. The form is publish into portal. Now there are 5 view in Adobe.

1. Select Employee.

2. Select Process

3. Edit

4. Check and Send

5. Completed

Right now stuck in no 3 view. In Edit step, "Check and Send" button is click. At this time, it require to validate. Example, validate field length or make compare. However, not sure where to create. Can anyone guide this? Kindly provide step-by-step.

FYI, this is HCM process. Configuration is at Personal Management->HR Administrative.

Thank You,

Aaron