To edit the properties of a certain field, follow the steps below:
Enter Screen Designer.
To select the field you'd like to edit, click on it in the middle section of the screen designer.
Tip: It is highlighted in yellow once selected.On the right hand side, click Field Properties.
Under this you will see a few different properties that can be edited. The one we are looking for is titled View Type under Screen Field Properties.
There are 4 different properties you can assign to any given field:
Normal field: This is the default option which has no special properties assigned to it.
View only: This makes a field read only.
Forced Data Entry: This makes it so a user cannot proceed without first filling in the content of this field.
Protected: This makes it so that if a change is made, a warning is shown before you can continue.