To add new pages to your website follow these steps
Step 1: to add a new page to your website,click on the icon the arrow is facing (the 4th icon on the side bar)
Step 2: The side panel opens up. There you get to see the list of pages already created and also the ( +Add Blank Page) button.
Step 3: after clicking on the + Blank Page, another panel shows up, click on the Blank Page button and it changes with an option to either Add or Cancel.