Apple mail sketch

You're referring to the "Sketch" feature in Apple Mail!

Sketch is a feature in Apple Mail that allows you to create a rough outline or sketch of an email message before you start writing it. This can be a helpful way to organize your thoughts and structure your message before you start typing.

To use Sketch in Apple Mail, follow these steps:

1. Open Apple Mail and start a new email message by clicking on the "Compose" button.
2. Click on the "Sketch" button in the toolbar at the top of the window. It looks like a pencil and paper icon.
3. A blank canvas will appear, and you can start drawing or typing your message using a variety of tools and colors.
4. You can use the tools to draw shapes, lines, and text, and add colors and images to your sketch.
5. Once you've finished your sketch, you can click on the "Convert to Text" button to turn your sketch into a regular email message.
6. You can then edit and refine your message as needed before sending it.

Sketch is a fun and creative way to approach email writing, and it can be especially helpful if you're trying to convey complex ideas or diagrams in your message.