Initialized value in Input values

Summary:

How can we initialize value in payroll input value when we are going to create it first time.

Content (required):

We have created element and attached input values as per requirement. However, in one input values we have assigned values set which need to be auto initialized once element created first time instead of user select it manually from the list.

Is there any to set default value appearing in list which is at top or any other way.

Version (include the version you are using, if applicable):

21D

Code Snippet (add any code snippets that support your topic, if applicable):