By default, Software AG Designer will include all of the files in a project when building (and launching) it. However, for many applications it will be necessary to customize the build path, adding additional files from outside the project (and less commonly, limiting the set of files under the project directory that will be included). The set of files under the project directory that will be build can be customized using the Source tab. Software AG Designer provides three ways to add additional files from outside the project to its build path: