I created a simple map in ArcGIS Online viewer. I added a layer from our AGS and then went to re-symbolise but the 'change symbols' window is not available when I click the arrow. Is this something to do with the type of AGS service I'm using?
Apologies in advance - I'm brand new to most of this so may have missed a step.
I was just struggling with this topic and stumbled upon another gotcha ... thought I'd pitch in my $0.02. When publishing a map service, make sure you enable "Allow per request modification of layer order and symbology". This can be found in Service Editor -> Capabilities -> Mapping.
