Page Groups
Page Groups can be used to add another level to the structure of your site. Describing how they work is considerably more complicated than just using them; do read the following, but bare in mind that it probably won't make a huge amount of sense until you've tried playing with them.
Let's suppose your site has a section called Help. Let's suppose you've made a page within the Help section that is called Sub Menus. So far, so good... Now let's suppose that the text you've written to explain Sub Menus is way too much information to put on that single page; what you really need to do, is break it up into several pages. A Group of Pages, if you like...
Each page group is represented in the sub menu by by its own master page. When you go to that master page, the sub menu expands to show you the other pages within the group. You'll notice, for instance, that this page's sub menu is showing, not only Sub Menus, but also the other pages that make up the group.
Making Page Groups:
To make a Page Group, you'll need choose a page, and make sure that it has been added to the Sub Menu (if it's not in the Sub Menu you won't be able to see the other pages in the group).
At the bottom of your edit page is an Page Kind option list; change this from normal to group and click update page.
Now you need to look at the left-hand side of your yellow admin bar; you'll see that it now shows 'breadcrumbs' that tell you where you are in your site structure. Up until you create a Page Group, the breadcrumbs have only shown the Section name. Now that we're in a Page Group, it'll show the section name, and the page group name you've created within that section. In the example case, we were in the Help section, where we made Page Groups, so the admin bar breadcrumbs would show:
Help > Sub Menus >
The reason for displaying where you are within the site structure is that the buttons under the admin bar now effect your Page Group...
So now when we add a new page, it will be added to the page group, rather than the section. Click Add new page, give the page a title and click update. Now click add to sub menu; you'll see that your new page has been added into a nested menu that appears underneath the main Page Group.
Similarly, when we're in a page group and we click Edit sub menu, we'll be taken to the Edit sub menu for that page group, not the section that contains it.
To leave the page group, and get back to the main section, you just have to click on the section name in the breadcrumbs.
Nesting Page Groups:
You can also create page groups within other page groups. And yet more groups, within those sub-sub groups. And so on. In what can only be described as an inspired piece of programming, weblobe's head developer created a Mandelbrot-like, infinitely-recurring piece of code which allows users to go way deeper than the basic principles of UI design would suggest is sensible. Or indeed usable. The number of levels deep you can go is only limited only by your own good sense. Let's be careful out there...