Reference codes can appear in many places in the evaluation or graphics:
Within the software there is a report "Reference Codes" which describes the reference codes that appear in the software with a short text:
We have decided not to maintain this report any longer, but to list the reference codes here in the wiki. We have noticed that many of the reference codes no longer exist, either because the software has evolved, new features have been added, or the rough hints have been converted into more precise information. It was therefore decided to only list reference codes and hints that can still be reproduced with the current version and, where possible, with a detailed description of the information.