Use business process to add ui elemenets

I want to use a business process to add a ui element in the form page, for example adding a text field, it will be from the object itself but we need to have users able to add it by themselves and it gets saved in the page design -no issues with placement-

Can this be done? and also how will the new item show, can I control the label/title on page using this process? from user input for example.