Module Position
From Joomla! Documentation
Understanding Module Positions[edit]
Module positions are placeholders in a template. They identify positions within the template and tell the Joomla! application where to place output from modules assigned to a particular position. The template designer has complete control over module positions, creating variations between templates and the respective Joomla! default positions assigned to modules in the installation sample data.
For example, the module position Left could be defined to be on the left side of the template to display a site navigation menu. So if a module is assigned the Left position, it will be displayed wherever the designer puts that Left module position - not necessarily the left side of the page.
Joomla 2.5 and Joomla 3.x will show the template positions with ?tp=1 or &tp=1 if the Preview Module Positions mode in the Template Manager has been Enabled:
- Extensions → Template Manager then click the Options button in the toolbar.
- Under the Templates Tab, make sure Preview Module Positions is set to Enabled.