Hello Muhammed,

By default, in reactive app dropdown widget shows the first element in the list.

To achieve your requirement, you have to add a new value to the beginning of the list.

Steps:

1. Get the list to show it in the dropdown.
2. Create an action for OnAfterFetchEvent.
3. Add new value to the 0th indexes of the list.

Please refer to the attachment for more details.

Hello Mohammed Abdul Muqeet,

Another option is to add an empty string "" or a "-" to the Empty text option of the dropbox. 

Hope it helps!

Paulo Rosário