4. Select the form placement
Sidebar will use the “landing page conversion area sidebar widget” if its in the sidebar of this page. If the sidebar widget isn’t there, go to appearance > widgets and drag and drop the landing page conversion area widget to the correct sidebar “Landing Page Sidebar”
5. Edit CSS for custom styling or to hide elements
You may need to alter the styles of your page depending on your theme. You can do this on the landing page edit screen.
display:none !important; hides elements
Alternatively you can create a new single-landing-page.php file for your theme and customize the code/layout from there