Plato pages works for posts, pages, and custom post types for users that have editing capabilites. Users are able to edit a page by 1 of 3 ways when logged in:

1. Go to edit the page and click on the link "Edit with Plato Pages" on the WP Admin Bar.
2. View the page you want edit and then click on the link "Edit with Plato Pages" on the WP Admin Bar.
3. View the page you want to edit and on the address bar of the browser, append "?plato" (yoursite.com/about-me?plato)

On page load, you'll be able to view the page along with the plugin controls on the right side of the screen.