Dynamic WMS map layers (September 2019)

[martyginqo]

I'm using the native map object and working through the WMS setup. Although it seems to work, I cannot get to step 2 and "the settings". 

1. Is there a way to dynamically specify the WMS URL (fx) [we will use to select combinations of  map layers provided by the WMS service - probably with a data island].
2. What are in these settings?  

(I've had to revert to my favourite GeoAnalytics extensions to get this functionality - below right image)

Thanks,

Martin