Baking normals x+ y- z+

How can I bake normals with swizzle coordinates(X+ Y- Z+) inside blender. Thanks

Bake using Cycles renderer

Thanks for the reply. But I cannot find bake option in Cycles Render. I’m using blender 2.70

Or bake normally and then invert the green channel inside your image-editing application.

Baking in Cycles requires Blender 2.71 or newer.

Thank you guys. Appreciate your help.