DITA2Go provides several macro libraries in the form of macro configuration files, organized by output type. These files are located in %OMSYSHOME%\d2g\local\macros. You can add your own macros, and override macros in the default macro libraries they reference. Table 39-9 lists the macro configuration files you can edit.
Macro libraries are referenced from output-specific configuration files; they can also be referenced from document-specific configuration files. Each editable macro library in turn references an eponymous macro library that contains all the macros distributed with DITA2Go. Do not edit those referenced libraries; they will be overwritten every time you update DITA2Go. To change a distributed macro, override it with a new definition in the appropriate \local\macros library.