How to receive customer's comment textbox in order form

[Morningstar]

I am creating an order form and inside I need to put a text box so customer when ordering he can add one line of note

How to do that?

[qatifserv]

I know two ways:

1- Using the Universal Module you can create whatever form you want and attach it to a product.

2- custom client fields.

 

[Morningstar]

What could I do without you guys  ?   Thanks a lot .  I wish I learn and can help others too.