SharePoint is great, because all you have to do is define your list and you get all of the forms for free, such as the form to edit the list item:
This is actually a physical ASPX page. In SharePoint Designer, go to the Proposals tab (or open Proposals from the Lists and Libraries section). Under the Forms section, you will see, for example, EditForm.aspx.
But what if you wanted to have an edit form, where you were not able to edit the Title of the document? The following recipe will show you how to create an additional Edit form, and then customize it to your needs.
Let us create a new edit form and then customize it:
From the Proposals tab, select the Forms section and click on the New button. In the Create New List Form dialog, enter a filename of EditRevised. Ensure that the Edit item form option is selected, as well as the checkbox for Set as default. Also, select the checkbox for Create link and provide a name for the Link and...