Can you use subheadings in letters?

Yes, you can use subheadings in letters, particularly in more formal or structured correspondence, such as business letters or reports. Subheadings can help organize content and make it easier for the reader to navigate through the information. However, in more traditional or personal letters, it's generally best to keep the format simple and straightforward. Use subheadings judiciously to enhance clarity without making the letter feel overly formal.