Examine the photo for which you have to write a caption. Obtain any facts that the photographer may have accumulated while taking the picture. Verify each fact, including the spellings of anyone's name, the date and location where the photo was taken.
Compose a sentence that names the individual or individuals in the photograph and describes what they were doing, where they were, when they were photographed and why they were there. Break the sentence into two if it exceeds 25 words.
Enhance the photo's immediacy by using present tense in the caption. Use commas to help identify the placement of a person if several people are pictured, such as, "John Smith, left,...."
Avoid using cliches. Strive to use conversational language that a relative or friend could easily understand.