Video 173
In this video I introduce ArcGIS OnLine Assistant that you may not have come across.
It is a way to get to the JSON behind your content (items). You can directly edit JSON to do things such as repoint layers to different services/servers rather than manually work your way through using the WebMap interface.
Useful for when you know there are some values you just want to do a Global Replace on.

Be careful though! You are editing JSON which is very temperamental when it comes to format especially those {curly brackets} :)

My demonstration changes the Titles for Prints in Experience Builder (print widget).

AGOL Assistant:
https://assistant.esrips.com/

VertiGIS ItemManager (need to register first):
https://apps.geocortex.com/

Its a useful tool to do other things such as copy items from one AGOL/Enterprise to another. So that might be a backup or environment promotion requirement.