You can create zones by reading them from a file (called a zone file) that contains the attributes of previously saved zones. An application can save the current zone definitions to a zone file any time with the IG_REC_zones_save() function. The application can load them from a zone file with the IG_REC_zones_load() function.

When a zone file is loaded, any previous zones on the image are removed.

If the application calls the IG_REC_image_recognize() recognizing function on an image with an empty zone list, the page-layout decomposition function is called automatically.