Is there a way to convert or update an existing custom picklist to use a global picklist without deleting and recreating it? As most will be aware this cannot be done easily if the field is referenced in code.
In an attempt to find a way I created a global picklist, then a new picklist to use it - then pulled the object down into Eclipse to see if there was any reference to the global picklist. I couldn't see any. I also cannot see any reference in the documentation on how to use the new feature with existing fields:
Salesforce support have confirmed this isn't yet possible. Here are the ideas to vote up:
https://success.salesforce.com/ideaView?id=08730000000cJegAAE . (partially delivered)
https://success.salesforce.com/ideaView?id=0873A000000lLsWQAU (collecting votes to have it fully delivered)