We've updated custom instructions to make it easier to customize how ChatGPT responds to you. With the new UI, you can tell ChatGPT the traits you want it to have, how you want it to talk to you, and any rules you want it to follow.
If you're already using custom instructions, this won't change your current settings.
The new UI is rolling out now onhttp://chatgpt.comand desktop on Windows, and is coming to mobile and desktop on MacOS in the next few weeks. Available soon to ChatGPT users in the EU, Norway, Iceland, Liechtenstein, and Switzerland.