I am finishing a geologic map. I have all geologic polygons in a single layer.
I want that the legend shows the geologic polygons separated by age and that each group to have a header stating the age.
One thing that worked is select the polygons from the same layer and save the selected polygons as a new layer. Another thing that worked is creating separate legends for each age.
I wonder if there is a more simple way to do it in the print composer?
I am using Qgis 3.10 OSgeo4w on win10 64 bits