You may create One Page with anchors for page sections just in a few steps, follow them:
Step 1: Create the page with the necessary content. Edit your rows and add anchors to Row ID field
Step 2: Go to Appearance > Menu. Create menu for your one page. Use the Links element to create items for your sections. URL field contains your page URL. Save menu. Then appears Anchor section (is row ID you set in the previous step).
Step 3: Edit your page and navigate to Page Layout settings. Select newly created navigation from the drop-down list and also enable One Page Navigation.
