Open MRK File
MRK files are common text files in digital camera storage along with the digital images taken.
The MRK file describes the order in which images should be printed when images are printed directly from the camera.
The MRK format file is used by digital photo printing services that support the Digital Print Order Format (DPOF).
The print order file is usually saved in the miscellaneous folder (depending on the camera structure) on the digital camera media and is called "AUTOPRINT.MRK".
The first version of the DPOF standard, where the structure and capabilities of the MRK format are specified, defined the procedure as parameters and order of printing photos.
MRK files allow users to attach a camera directly to the device or printer and print, email, or view a slideshow of selected photos automatically.
Because it is a plain text file, MRK files can be edited with any text editor, such as: