Can the AI assistant change a letter I've already written?

Open this screen in Saral/accounts/letters

Yes. With text already in the body, the same prompt revises it rather than replacing it. Everything it writes lands in the editor for you to read and change before it goes anywhere.

Not what you needed? Inside Saral, ask Kuku (Alt+K) — if it cannot answer, “Ask a human” sends the question to Saral support with the chat attached.