Livecycle

To define the behavior of a drop-down list or list box            

1.	In the Object palette, in the Value tab. From the Type list, select one of these options:

•	To allow users to choose to enter data or not, select User Entered – Optional.

•	To prompt users to enter data and make the field recommended, select User Entered – Recommended and type a custom message in the Empty Message box.

•	To prompt users to enter data and make the field required, select User Entered – Required and type a custom message in the Empty Message box.

•	To make the field read only and display a data value that is calculated and displayed through an attached script, select Calculated – Read Only. Users will not be able to edit the calculated value.

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To make the field editable and display a data value that is calculated and displayed through an attached script, select Calculated – User Can Override. Users can edit the value if the calculation script has been written to accept the input. If a user does edit the calculated value, the custom message you specify in the Override Message box appears.

•	To make the field read only and display a data value that is merged or calculated and displayed at run time, select Read Only. Users will not be able to edit the value.

2.	If the value is recommended or required, type a prompt into the Empty Message box.

3.	If the value will be calculated, attach the calculation script to the object using the Script Editor.

4.	(Optional) If a calculated value can be overridden, type a message into the Override Message box.

See also 

To dynamically populate a validation pattern message

To dynamically populate a validation script message

Drop-down list properties in the Value tab

List box properties in the Value tab

To define the behavior of a drop-down list or list box