Very confused about Styles and layers

[geney]

I'd like to create a style to applied to maps. Starting with an OS would be fine, but I can't figure out how to edit any features of the map in Pro. I've looked at a lot of documentation and videos and none of them quite walk me through what I'm seeing. My Contents pane shows Drawing Order > Map > The name of the map, but there are no editable attributes. I can't choose buildings or roads, etc. in order to edit how they appear on the map. What am I missing? 

[DavidPike]

What's the data source?  Sounds maybe like you have a WMTS or vector tile service etc.  Also, a picture paints a thousand words.

[PeterHodkinson]

Hi @geney 

Any layers you have added to the map should be listed underneath "Map" in the Contents pane. You should be able to configure each layer's appearance by right-clicking on the layer > Symbology

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