Google has introduced a new update for Gmail's Gemini-powered Help Me Write feature, allowing users to refine existing drafts using their own text instructions instead of relying only on preset editing options. The update also adds undo and redo controls for AI edits. According to a Google blog post, users can submit another prompt describing exact changes, and Gmail revises the message accordingly. The new capability expands previous preset options such as Polish, Formalise and Shorten, enabling specific requests like adding missing information or including a deadline. Google said the feature is enabled by default for eligible users and is rolling out now across Rapid Release and Scheduled Release domains, with wider availability expected by July 20. The feature is available for Business Starter, Standard and Plus, Enterprise Starter, Standard and Plus, Frontline Plus, Google AI Pro for Education, AI Expanded Access customers, and Google AI Plus, Pro and Ultra subscribers.