1. Log in to your Joomla administrator dashboard.
1. Click on “Menus” and select the menu in which you want to add a custom page.
1. Click on “New” button and select “Article” or “Single Article” under the “Articles” tab.
1. Give a title to your custom page and fill in the content.
1. Set the menu item type to “Single Article” and select the menu in which you want to add this custom page.
1. Save the changes and go to your website’s frontend to see the new custom page in the menu.
1. You can also add custom modules and plugins to your custom page by selecting the appropriate options under the “Options” tab while creating the article.