When you require a field, users can't save a record until the value is entered. You can make a field required across your entire app or only when it appears on a special form.
To require entries in a field across your entire app
You can require fields using either field settings or Visual Builder.
Use field settings to require fields
In the Basics section, select the Must be filled in checkbox:
Select Save. Required fields are shown with a red asterisk next to the field's name on the fields page. For users, a red asterisk appears next to fields on forms to indicate that values are required.
Use Visual Builder to require fields
Open a table, select Settings, then select Structure. Visual Builder opens with the table expanded.
Select the field you want to require, then use the field properties on the right to select the Must be filled in checkbox:
All changes are saved automatically.
How to require entries in a field only when it appears on a particular form
Create or edit the form on which you want to make the field required.
Select the field you want to require, then select the Required checkbox.
Select Save.
How to make a field required, but only when it is shown
You can use dynamic form rules to make a field required, but only when it is shown:
