To prevent visibility of content from being partially lowered due to existence of a projection unsuitable area while effectively utilizing a projection suitable area. Provided is a content projection control method including the steps of obtaining content data indicating content including a plurality of objects, each object including one or more images or a plurality of characters, obtaining projection area data indicating a projection area, determining a projection unsuitable area, which is not suitable for projection in the projection area, based on the projection area data, generating a plurality of arrangement units from the content indicated by the content data, each arrangement unit including one object or a plurality of adjacent objects, and changing a layout of the arrangement units by determining a projection position of each arrangement unit based on a position of the projection unsuitable area.