Start by selecting the Site menu option. Now down to the Global Configuration menu item.
From the Site tab there are a number of options available, inclucing setting your Site Offiine.
Click on Yes to place your Site Offiine. Click the Save & Close button to save and enable the new setting. Let’s view the site frontend to see how the new setting affects our site. Click the View Site link.
Your site now shows that it is offiine and displays the appropriate message.