## Step 6: Build the project |
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| In the build step, all defined media files are generated. There are two different build modes: Regular build Build the media files and place them in the media file output directory. This action is also available from the toolbar and by choosing Build->Build project from install4j's main menu. Test build Build the media files in the temporary directory only. This mode allows you to check whether your configuration is ok while not making any changes to your file system. This action is also available from the toolbar and by choosing Build->Test build project from install4j's main menu. When a build or a test build is started, important status messages are displayed in the text area labeled `build output`. A progress bar appears in the status bar of install4j's main menu which indicates what percentage of the total build has been completed so far. The build process is asychroneous, so you can change to other steps while it is running. The status bar will inform you when the build process has finished.

| With the `Build selection` section you can choose which media files should actually be built. This can be useful for testing purposes, or if you have defined media files that should not be built by default. With the standard setting, all media files will be built. If you select the radio button `build selected`, only the media files that are selected in the adjacent list will be built. These settings are persistent and are saved in your project file, however, when you build from the command line, your build selection will be ignored unless you specify a special parameter. Please see the help on the command line compiler options for further details.

| Also, have a look at the available build options.