Gemini 2 has multiple configuration options which can make your scan, review, and cleanup experience even better. All customizable options are available in the Gemini 2 Preferences window. You can open it by doing the following:
Gemini 2 Preferences includes the following tabs:
The detailed information about the Preferences is provided in Gemini 2 User Guide.
Gemini is smart. It easily tells copies from originals. It knows which files to keep intact. But the best thing is that it learns to select duplicates the way you do. Gemini's algorithm remembers what you delete and what you choose to keep. It's like an apprentice you are training.