Navigate to the my.popmenu.com Dashboard
Click Website > Web Builder
Select the Menu page
If there is not a Menu/Menus Section follow these steps:
Click Add Section (If you scroll down the page slightly you should see it)
Click to Choose the Section Type select Menu.
Select the menu you'd like to add and click +Add Menu to add a second one.
From here, you will be present with a drop-down which you will be able to select the Menu that you want to display on this page.
Hit Publish when you're ready to set the menus live!