History: Additional layout layers feature

            {syntax type="markdown"  editor="wysiwyg"} Since Tiki 2 or so, there has been an extra div around module boxes, with the class *box-shadow*. Now in Tiki 3.0 there are more such divs in tiki.tpl, for adding additional styling, as follows, and a switch to activate them all:

- div id="main-shadow"

Just outside *div="main"* (surrounds the whole visible page)

- div id="header-shadow"

Just outside *div id="header"* (surrounds the page header and its logo, site title, top menu, etc.)

- div id="middle-shadow"

Just outside *div id="middle"* (surrounds the middle of the page containing the left, center and right columns)

- div id="tiki-center-shadow"

Just outside *div id="tiki-center"* (surrounds the center-column content)

- div id="footer-shadow"

Just outside *div id="footer"* (surrounds the footer (bottom bar) area

These divs are activated to be styled by checking|ticking the checkbox on the Look and Feel admin page. They are then ready to receive styling from themes that recognize them.

Activating this option will have a global effect (the site's templates/tiki.tpl file will present the additional divs), but presumably they are ignored if a theme doesn't specify anything for the above selectors.

Ref: http://doc.tiki.org/Shadow+Layers