How to display module positions in Joomla?
Enable the preview of the module positions in the Joomla template to view your template structure. This tutorial explains how to display module position in Joomla.
Enabling module positions
Log in to Joomla ➝ click System ➝ Templates ➝ Site Templates ➝ Options ➝ Preview Module Positions ➝ Enabled ➝ click the Save button.
Preview module positions
Enable the preview of the module positions in the template by appending tp=1 to the web address. For example:
https://www.your-domain.com?tp=1