Nano Banana Lets You Edit Images by Drawing; SynthID Extends to Video
Google Gemini adds image editing via drawing and visual prompts, while SynthID now analyzes videos for AI watermarks, helping users verify AI involvement across images and clips.
Google's Gemini platform introduces a new way to edit images with Nano Banana. You can draw on pictures and leave visual cues to guide edits, reducing the need for long text instructions. This makes creative adjustments faster and more intuitive for learners of English.
What’s new with Nano Banana
In Nano Banana, you edit by drawing on the image using the Sketch tool, highlight areas, and point to specific elements. The editor shows undo controls in the top-right corner. The Text tool lets you place prompts directly on the picture for precise adjustments.
After uploading an image, open it in the dedicated editor. You can draw with Sketch, mark regions, and indicate elements, while the Text tool enables prompts right on the image surface.
When you upload your first image, the service will notify you about this new capability. The feature will roll out to all Gemini platforms on Android, iOS, and the web in the near future.
SynthID expands to video content
At the same time, Google expands SynthID, its watermarking system for AI content, to video. You can upload a video up to 100 MB in size and up to 90 seconds long and ask whether it was created or edited with Google's AI. Gemini will check both video frames and audio for SynthID marks and provide explanations with precise timestamps. For example, it may report AI traces in the audio between 10 and 20 seconds, while the visuals show no marks.
Checks for images and videos with SynthID are now available worldwide in all languages supported by Gemini.
Background and rollout
In October, Google announced that Nano Banana would appear in Google Search and Google Photos. In November, Google released Nano Banana Pro, an enhanced version built on Gemini 3 Pro. Demand was high enough that Google limited free access for some users.
Expert comment: "In-image editing with visual prompts makes AI tools more approachable for everyday creators. It also highlights the need for reliable provenance signals and watermark checks."
Summary
Nano Banana now supports drawing-based edits and on-image prompts, with broader rollout across Android, iOS, and the web. SynthID expansion to video adds a practical way to verify AI involvement across media. The Nano Banana Pro release and wide availability demonstrate Google's focus on accessibility and content authenticity.
Key insight: Visual prompts and cross-media watermarking unite editing creativity with content provenance, helping users verify AI involvement across formats.
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