LABELS on demand

[Michal Krupička]

Dear users and developers,
 is there any way to show labels only when user wishes to see them?

I think this is one way to use 

LABELREQUIRES "[labellayer]" in layer, which has to be labeled,
where [labellayer] is empty layer, which is represented by checkbox in template.
But this needs 2 layers...

Is it possible to do it directly with no use of any other layer?

Thank you all
Mike
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