If the release is specific to one or more platforms, use this setting to indicate the platforms: click the value of this setting, and then click the ellipsis (...) button to specify the appropriate platforms.

If the platform specified for a component does not match one of the platforms that is selected for this setting, the component is not included in the release.

The default value for this setting is Use Project Settings. This value indicates that the release supports the platforms that are specified at the project level.