Google Gemini is preparing to give users more control over whether AI-generated content carries a visible watermark, making it harder for people to identify synthetic media at a glance. Here's what to know An announcement from Gemini's official Twitter account, cited by Gizmodo, said users will be able to "decide if your image, video, and music creations made with Gemini will have visible watermarks." That would make visible labeling an option u…