Maps now carry a system prompt

A map now has a system prompt of its own. Open it from the toolbar, write the instructions you want the model to work under, and every response generated on that map from then on is written under them.

This is where the things you would otherwise retype belong. The voice you want, the audience you are writing for, the shape of an answer, the domain you are working in. Write it once at the top of the map instead of at the top of thirty prompts.

It applies to responses generated from that point on. Answers already on the canvas stay as they were written.

Open a map and set its system prompt from the toolbar.