WinRAR can read default values of command line switches from rar.ini text file, which can be stored either in the same folder as WinRAR.exe or in %APPDATA%\WinRAR folder. This file includes strings in following format:
First applies switches to all and second to individual commands. For example:
Most of switches specified in rar.ini are used only in the command line mode. Some switches can be applicable both in shell and in command line modes. Previously this rar.ini format was supported only by console RAR.