Diplay data in a input dropdown

Hi

suppose that user creates a “category field”. After that he selects that data which is displayed in a input dropdown.

Is there a way to shortcut it to showing the category field created as the choice of the input dropdown immediately after its creation?

Make the last value of choices the default value. whenever a new thing is created it be the last, thus the newest one is the default all the time.

The problem is that I’m using autobinding in this and I need to do it. So default value not an option unfortunately.