HOW TO
Unlike Image services, it is not possible to modify the viewer, e.g., HTML Viewer, in order to change the selection color for layers in an ArcMap Image service.
This must instead be done on a layer by layer basis by changing the properties of a layer in the source .mxd. For example, it is possible to have five different selection colors if five layers are included in the .mxd document that is used in the ArcMap image service.
Article ID: 000007982
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