Final answer:
To organize information using the outlining method, Marcus should use main headings as the first-level text, subheadings as the second-level text, and supporting details as the third-level text.
Step-by-step explanation:
The outlining method can help Marcus organize his notes effectively. According to the outlining method, the first-level text should be the main headings or main ideas. These are the primary categories or topics that Marcus wants to cover in his notes. For example, if Marcus is taking notes on a history lecture about World War II, his main headings could be 'Causes of World War II', 'Major Battles', and 'Effect on Global Politics'.
The second-level text should be subheadings or subtopics that provide more specific details under each main heading. These subheadings will help further organize Marcus's notes. Using the previous example, the subheadings under 'Major Battles' could be 'Battle of Stalingrad', 'Battle of Normandy', and 'Battle of Midway'.
The third-level text should be supporting details or key points that provide even more specific information. These details will support and expand upon the subheadings. For instance, under the subheading 'Battle of Stalingrad', Marcus can include key points such as the dates, the commanders involved, and the significance of the battle.