Custom variables questions in templates

There are two questions I met:

1, I really want to display the keys when choosing the variables in dashboard, rather than the values. So, how to add custom value alias or define the key/value variables in templates?

2, I found that the custom variables is not effective in “Value groups/tags (Experimental feature)” function. I really want it to be supported. Because it is inflexible only by query of elasticsearch. I wish I can make the custom tagname(from custom variables).

My datasource is elasticsearch. And the grafana is 4.4.3.

Really appreciate for your help :slight_smile:

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