The document provides instructions for customizing courses on the ResearchReady platform, including duplicating an existing core course to edit its content, finding the duplicated course, editing or creating new lesson pages, and editing content using either the rich-text or HTML editors. Key steps include duplicating a core course, approving the prompt, finding the copied course, expanding lessons, clicking "Edit lesson" to modify content, and clicking "Add page" or "Edit page" to create or modify individual pages using the visual rich-text editor or code-level HTML editor.