I have ComboBox and it has item inside user can select item they want, if they can't find item they can select first item (Not in this list) and input data in textbox (textbox will show if user select first item)
(Not in this list)
Item A
Item B
Item C
Now my boss just email me that they think this is not convenient for them and need me to create more easy-to-use UI. Please help me how to improve my UI?