Some photographs require information to be included on the image itself, such as a scale, a compass point or text labels. For example, a photomicrograph or electron micrograph needs a scale bar. Since any change from the original size will alter the magnification as stated in the caption, it is preferable to draw the scale directly on the photograph.

Images will look more professional if this information is styled consistently with the rest of the designed publication. If the information is embedded in the image as pixels, it cannot easily be edited.

Include only the necessary information on the image, and place the information in a clear area of the image so that it does not obstruct the subject and can possibly be edited by a designer. It might be worthwhile supplying the image with the information and a copy without the information so that the designer can add the information consistently with the rest of the document, and ensure that the scale and any other features are respected if resizing is required.