How to change build configurations?

You can have more than one configuration for your project. Build configuration contains the information about the files included to a build. By default, every project has at least one build configuration that includes all files referred to project. You can customize configuration and exclude files from the build, they will remain in the project though.
To create a new build configuration:

  1. Select a project and go to Projects ->Properties.
  2. Select the Build Configuration option from the tree view in the left pane.
  3. Press Add… in the right pane.
  4. In the pop-up window, enter the name for your new configuration and press OK.
  5. The new configuration will be added to the list. Check it to activate.

You can modify your configuration only when it is activated. Otherwise, the default configuration  remains enabled which makes customization impossible.