Where are my Joomla Module Positions?

Modules positions are places on your webpage, set up by your template’s index.php and listed in the related .xml file, that can contain modules such as a menu module or a poll module. You can have more than one module in each position dependent on space available. An example of this would be the left column which might have several menu modules, a login module and more.

Good template designers usually provide a screenshot with the module/user positions marked by name eg: top, banner, user 4, footer, left, right etc. If there is no module assigned to these positions, they ‘collapse’ and take up no ‘browser real estate’. So if you have a banner position but no banners, you won’t see anything in that position on your page.

In the old Joomla 1x it was easy to see the positions, they were available in Admin and you could view your page with the positions outlined. In Joomla 1.5x we can view the positions by adding ?tp=1 to your url. Here is the Joomla demo page exposed!
http://demo.joomla.org/1.5/?tp=1