In this Tutorial we will teach you how to set up the Powered By module. First of all, download the Powerd By Module from here and save it to a location you can find.
Once you've done this, click Extensions > Install/Uninstall.

Click the browse button of the Upload Package File section and choose mod_poweredby.zip that you just downloaded.
Now click the Upload File & Install button to install the module.

Once you have installed the module, it is time to set it up.
Navigate to Extensions > Module Manager.
You should now see your list of installed Extensions, click the extension titled Powered By.
Clicking this link will display this page:-

First of all check the Enabled check box to Yes.
Change the Module Position to Footer

Now you can either save your module or you can add your own phrases to the list!.