I am trying to build a custom multilayer basemap consisting of two hosted tile layers. One is large scale (1:400 to 1:5000) showing detailed building outlines and the other is small scale showing generalised features (1:2500 - 1:5000000). The problem I have is I cannot get the map viewer to respect the zoom levels for both layers. Depending on which layer I add first, that layer's zoom levels take precedence, i.e. If I add the small scale map first I can't zoom past 1:2500, even if both layers have been moved to basemap.
I have tired this in the ArcGIS Online Map Viewer and by publishing from ArcGIS Pro.
I would to accomplish this without code.