Hi Prashil,
This is how it may look in the application:
In modeling:
1. Add the relevant fields with controls for the Form. Also add a numeric field for "size".
2. Add the Visibility Conditions: @size>0 for the first control, @size>1 for the second, and so on.
3. In the Layout Board, define the Action for "Add" button:
Hope this helps
Here is another reference for showing / hiding controls:
Multiple rows for a selection criteria
Thanks
Udi