An object is to improve convenience for a user to lay out image data by displaying a trimming region when necessary. A non-transitory computer readable storage medium stores a program that causes a computer to function as a display control unit capable of displaying a screen having a first region in which to place an object and a second region surrounding the first region, and configured to switch to displaying or to hiding the second region in the screen according to a setting indicating whether to display or to hide the second region. In a case when the setting indicates hiding the second region, the display control unit displays the second region based on a position of the object in the first region.