Customize EditForm.aspx, AllItems.aspx or any forms.

1. Goto Sharepoint designer.
2. Open desired site and then list in folder view.
3. Copy EditForm.aspx and paste it
4. Rename the newly copied EditForm.aspx ( MyEditForm.aspx)
5. In new MyEditForm.aspx go to code view.
6. Search for ListFormWebPart. (WebPartPages:ListFormWebPart)
7. Go to the properties of ListFormWebPart (Webpart properties)
8. Check the hidden check box under layouts section. (Layouts/Hidden)
9. THen,
10. Go to Insert menu.
11. Select Sharepoint Controls.
12. Add Custom List Form.
13. It will expose the whole webpart in a form of text boxes,lables and all HTML controls.


You can play with them by hide/show or whatever you want to achieve. Nice enough???

Note: By doing so, you will also able to add column values for Folder also. I mean, generally you can not add properties of Folder, unlike you can do for a list item or a Document. But this process will enable you to add properties of folder.