Selective Photo Detail Modification

A specialized prompt for Nano Banana 2 designed to edit a single specific detail in an existing photograph while maintaining the rest of the image integrity.

gemini

The skill

the {argument name="subject part" default="dog's mouth"} is {argument name="state" default="closed"}.

How to install it

Gemini

1. Open Gems → New Gem.
2. Paste the text below into the instructions field.
3. Save. The Gem appears in the sidebar and keeps the instructions
   across conversations.

In Google AI Studio the same text goes in System instructions.

Did it work for you?

Where it came from

YouMind OpenLab MIT The original

2026 YouMind-OpenLab