How to use the baseline functionality in 3.6.5. release of XML documentation

[#1]

How to use the baseline functionality in 3.6.5. release of XML documentation

[#2]

In the baseline tutorial it mentions use of labels to set a baseline. Can you direct me to information on how to set labels for ditamaps and dita topics?

[#3]

Please refer to the below video

https://bluejeans.com/s/vcvJu