You can specify the order in which items are displayed in a region. If the items in the region are displayed by group, the order determines the order of the items within each group.
   
You
    must have at least one of the following privileges to change the 
   order of items in a region:
Manage All privileges on the page group to which the page belongs
Manage privileges on the page
Manage global privileges on All Pages
Go to the page with which you want to work.
Switch to Edit mode.
    Click 
 
    in the region that contains the items you want to group.
Note: The item ordering options are available only for item regions.
In the Sort By list, choose:
Default to not order items. If you choose this option, items are ordered according to how you explicitly place them in the region.
Title to order items alphabetically by their display name.
Size to order items by their size.
In the Sort Order list, choose:
Ascending to order items from A to Z (Title), or smallest to largest (Size).
Descending to order items from Z to A (Title), or largest to smallest (Size).
Click OK to return to the page.
    If you choose to order the items in a region by display name or size, 
    the Arrange Items icon (
)
     is not displayed in the region toolbar. Because the order of the 
    items is determined by the Sort By 
    option, you cannot manually order the items.
   Choosing the categories available in a page group
   Choosing the item types available in a page group