Grouping cached services

[MarkCooper5]

I have a a number of aerial photography and historic mapping  layers which cached image services. These need to be added to a webmap with a bunch of dynamic services. I would like to group them (ie all aerials together) to keep the map tidy but I am aware there is no functionality in AGOL web maps to have group layers. Is there another way to do this? f not, I will have to not hold  them as cached services, which would be detrimental for performance.

Thanks

[AdamEversole1]

I don't think I fully understand the question

A) You have several cached image services. I assume this is cached maps service coming from ArcGIS online and/or ArcGIS Server. Services like our Imagery basemaps.

- World_Street_Map (MapServer)  <Sample Server 6 cached mapservice

- World_Imagery (MapServer) <- AGOL cached basemap map service

B) I'm not sure what it means Dynamic Service, do you have a example? 

C) Yes, ArcGIS online does not provide Gropings of layers in the Map viewer currently, But this Idea is In the Product Plan for the future.

- Group layers for ArcGIS online 

Note ArcGIS server services do maintain their groupings in ArcGIS online 

- Water_Network_Base_Map (MapServer)  <- Sample Server 6

D) If your not using a Cached Service for them what type of service would be utilized? 

For B and D I'm thinking you mean Feature services, but I wanted to be sure. 

Cheers

- Adam