The rule to follow when writing a letter to a supervisor is to avoid unusual fonts.
One rule to follow when writing a letter to a supervisor is to avoid going off topic. It is important to stay focused and address the subject matter at hand, providing relevant information or discussing specific issues or concerns. Going off topic can confuse the reader and detract from the effectiveness and professionalism of the letter. Therefore, it is important to organize your thoughts and ensure that your letter remains concise and to the point.