Under Unix all configuration settings are stored in /.M/config under Windows in the registry. To get an overview over all possible configuration options and their default values, set the value RecordDefaults=1. Under Unix, do this by creating a new /.M/config file containig the lines
[M]
RecordDefaults=1
After running Mahogany, this file will then contain all default settings. Most of them are easily understood. Otherwise, the file include/Mdefaults.h contains them all with some short comments.