WMS standard allows specifying a list of styles for each WMS layer. The users can then use the style name in the URL query parameter "STYLES". If the styles are not specified, "default" is assumed.
But, how do I select such a style in QGIS? I was able to add a WMS server, and add and display its layers. However, although I can see all the styles listed in the "Layer properties", I haven't find any option how to select one.
For example, if some WMS service has a layer named "Vegetation", and for this layer the service defines styles "Grayscale" and "Green", how do I select "Green" instead of the default one?