Is it possible to combine different layers into one new layer?
Markers 01-10 belong to layer L1
Markers 11-20 belong to layer L2
Markers 21-30 belong to Layer L3
Now i want to have a layer L4 that´s the summary of the layers L1-L3,
with all markers.
Or how can i add one marker to multiple layers?
Thanks for your help.