Answer: using headings
Explanation:Headings are crucial because they boldly highlight the key concepts and support the main ideas.
They draw an audience attention on what is crucial so that an individual may immediately know exactly what the memo is all about.
Memo Heading are not an exception to this , they are a key factor in communication. This is why heading of a memo needs to be informative and engaging so that it will draw an immediate attention from its intended reader. Memos are used in companies to communicate with employees especially about key business activities.