To use a signature, put the menu in your message window

1.
Open a new message as if you're going to write a letter.
2.
Single-click on the Action button to get the menu; choose “Customize….”
3.
Put a checkmark in the box next to “Signature.”
4.
Click ok. Now you will see the Signature menu in every new mail message, as shown below. Choose the one you want to use for each individual message, or set a default in the Preferences pane.

You won't see an option to add signatures if you haven't made any yet!

TIP

If you can't do what you want with the text in a message, such as color it or even make words bold, go to the Format menu and choose “Make Rich ...

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