Hide layer names in a web map

[LyonMNGIS]

Hello,

I would like to share a web layer using ArcGIS Pro.  The underlying project has a multiple images that combine to create an air photo layer.

Question:

How can I create a hosted layer that lists the service name "1938 Air Photo Map" and not the underlying  images (bjc04044.jpg, bjc04046.jpg) that are used to create the map?

Figure 1:  I would like my map to only display "1938 Air Photo Map"   There is no need to turn on and off individual images.

Thank You!