Let's say you are switching to a new Joomla template and the position names differs from your old template; for example, the "left" position doesn't exist in your new template, instead is named "sidebar1".
Certainly you may edit each module to assign it to the new module position, but what if you have more than 50 modules? That would be an exhausting and repetitive work!
In this post, I'll share with you a quick way to switch all your modules from a given position to another one.