Is there a way to save configured pop-ups within ArcGIS Online and then use the saved configuration in other ArcGIS Online web maps?
M answer applies to ArcGIS Layers. For ArcGIS Server layers, see whyzar's answer, and the last part of this answer.
In ArcGIS Online:
- go to the Content tab and find the layer you are interested in setting popups for
- Click the layer to get to its settings (not shown in picture)
- Click the Visualization tab
- Click the Configure Popups button
- When done setting up the popup, click either Save Layer or Save As New Layer
Now when you add this layer to any map, these settings will be set already.
This works for Map Image Layers, Feature Layers, Imagery Layers, Stream Layers, thanks to Russ Roberts for adding this info. I tested this with a map image layer that references an ArcGIS Server service, and it worked when the reference was to a single layer, but not group layers.
Based on Esri's Configure pop-ups
Pop-up configurations you make on layers you own can be saved with the item properties and automatically enabled on other maps using that layer. The configuration applies to the layer in the map only and not the actual service running on your ArcGIS Server.
I'm not sure of an alternative that may be available either at this time.
Here's what I've done in the past - open the map image layer or otherwise in a map viewer. Configure the pop-ups as needed and then, going back to the properties for the layer, select 'Save Layer'.