....can select a checkbox to subscribe to a text messaging service. Selecting the checkbox displays a field to enter a mobile phone number. lo you…

Use a visibility condition on the mobile phone number field to determine whether to show the field:

In Pega, visibility conditions are used to control the display of UI elements based on specific

conditions. In this case, you would configure the visibility condition on the mobile phone number

field to display it only when the checkbox for subscribing to the text messaging service is selected.

Reference: Pega Academy, User Interface Design, Visibility Conditions.