(to edit an existing item) or the new table icon 
(to add a new item).Access this form by selecting the Tables node (within a database) in the
navigation pane and clicking the design icon (to edit an existing item) or the new table icon (to add a new item).
The form has its own toolbar and is divided into 3 areas. Click a link below for detailed information on each part of the form.
Table Design (Toolbar)
Table Design (Column List)
Table Design (Column Properties)
Table Design (Table Properties)