Step 1 - If you're in Easy Mode click the Add a Page button.
Alternatively, if you're in Advanced Mode, click the Manage Pages button
Step 2 - Name your page and click Next Step
Step 3 - Choose the Page Type - External Website Link
Step 4 - Enter the URL you wish the page to navigate to. You can even check the box if you want the website to open in a new window. After you enter the URL, click Next Step.
Step 5 - Drag your page to the menu and click Save
Keep in Mind:
- If you wish to edit the link in the future, switch over to Advanced Mode and click Manage Pages. You'll then be able to move your mouse over the page and click the green gear icon to edit the link.