If you are designing the ‘Detail’ form, you will get the Notes Access option to provide the Note access for the customer portal users and allow the portal users to add any Notes for further communications.
When you are creating a new form and after inserting the entity Fields, you can easily change the position of those Fields just by drag & drop under the specific Form Grid.
You can also move any Field to another Form Grid easily by drag & drop that Field. Other Fields automatically adjust the position.