Update Sets Update Sets track and store changes as you develop. You can use an Update Set to apply changes to other instances. For example, you can use an Update Set to move changes from a development instance to a production instance. Getting started with Update SetsBefore working with Update Sets, create a standard process for moving customizations from instance to instance. When working with Update Sets, be sure to avoid common pitfalls.Merge update setsYou can merge multiple update sets into a single update set to simplify the transfer process. You cannot "unmerge" update sets once they have been merged.