AutoVISION Quick Start Guide December 2020 ii. If the 2D code is rectangular, enble both DataMatrix ECC200, and DataMatrix DMRE at the bottom of the code selection list. DMRE is necessary to gaurantee that the system properly finds rectangular codes. b. When faced with other diffiult to read applications, try to use [Custom features]. You can use this in [Shown the Advanced Parametes Window]. See HELP for more detail.