Step 2: Click on your website
Step 3: Navigate to Design & Branding
Step 4: Select the Edit Design button
Step 5: Click the navigation button
Step 6: Customize your navigation
Upon clicking, Header Navigation Settings will appear. You can then modify your display order, or add new pages from the right hand navigation via drag and drop.
Navigation placement shown in Header Navigation Settings will mirror the placement on your live site.
Step 7: Save Updates
Select the Save For Entire Site button to see the updates to your header navigation.
Step 8: Save Changes
If you are satisfied with your changes, exit the design editor.