1. An image processing apparatus comprising: a processor; and memory storing computer readable instructions, when executed by the processor, causing the apparatus to function as: a document image acquiring unit configured to acquire document image data which is generated by optically reading a document and represents a document image; an area image generating unit configured to use the document image data to generate plural area image data representing plural area images that are included in the document image; and a file generating unit configured to generate a file including the plural area image data such that the plural area images are disposed in different pages.