Manual Documentation on Generate Lightmap UVs Advanced settings

I’m looking into how to improve my lightmaps particularly issues with and shadow/light bleeding and found this thread

I’ve never really messed with the Advanced settings for the Generate Lightmap UVs import settings so I figured I would like to get a better understanding of what these settings do so I turned to the Unity Manual. For some reason I can’t seem to find any information on these settings anywhere in the manual. The only info I can find on import settings is under animation and on the Editor image on this page it doesn’t even show the Advanced settings

Is it there and I’m just not finding it, or is there really no documentation on these settings? Anyone know?

Thanks

Ok so I finally found this. http://docs.unity3d.com/401/Documentation/Manual/LightmappingUV.html

Dated documentation, but I’m assuming still relevant. Is there a reason this in formation is not in the current documentation?