A composite image displayed on an image display incorporates a first portion of image content, and incorporates one or more second portions of image content within corresponding one or more picture regions of the composite image. One or more images properties selected from a resolution, a level of magnification, a measure of pan, a size, and a scale of each of the first and second image portions can be modified, and the modification of an image property of the one or more second portions of image content entails receiving either supplemental or replacement image data that provides for displaying a corresponding modified version of the corresponding one or more second portions of image content, the modification of which can be independent of the first portion of image content and is responsive to an action by the user that indicates at least an interest in or focus on the one or more second portions of image content.