User has using the application and when he submits, the missed fields are reflecting below so that user can understand the what is he missing.
But here are missed mandatory fields which are missed by the user, should be highlighted in the form, so that user can easily identify the fields missed and complete the form.
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Default behavior of Appian product is that mandatory fields are demonstrated with an asterisk (*) after the title, and upon attempting to press any button with Submit set to true and SkipValidation set to false, all fields that are required and not filled in are automatically highlighted in red.