Linking to outdated docs does not actually help 
, I have just started to learn the data layers and I watched some videos and it seemed clear and handy. Now with 5.1 having to manually create asset for every single data layer does not make sense 
Also why the very handy menu option “Add selected actors to new data layer” (which docs claim is there) was removed? Once set up data layers can be useful but currently it is near unusably complicated and slow. Please fix this i.e. make it to work the same as in 5.0 
It seems there are many other issues with data layers in 5.1 as well (based on what I have read here and elsewhere) so I think I will stay away from them and wait for fix before starting to learn them for real.
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