How do I add an existing form to a different landing page?

How do I add an existing form to a different landing page?

 For more information on how to access and use the landing page editor, see: How do I create landing page web templates?
For more information on forms, see How do I create a form?

In the landing page template editor, click on the “Add Object” drop-down and select "Form Container":


Select a form to insert into your landing page template: 


Click and drag to set position and dimensions: