In order to style a map comprised by OSM data (shapefiles), I want to use rule-based style. This is very handy, however: the data has so many attributes with lots of values that I somehow loose the overview.
Suppose I want to style different road types. In the properties window, I open the "fields" tab to see my options. I decide that I want to style according to the field "highway". Is there a way to see the possible values for this attribute without opening the attribute table? What I want to see is something like a list
This could enable making good and fast decisions on layer styles. If there is such an option, I hope someone can indicate it.