Add "Priority" to Apple Mail Toolbar
Frustrated with having to go to the dropdown menu and select a priority every time you need to mark a message as “important” for a recipient?
Here’s how you can permanently add the “Priority” selector to the Mail toolbar.
First, open a new message.
Next, click on the “Visible Header Fields” dropdown, usually located near the top left corner of your message window.
Select “Priority Field” and make sure that it has a check mark next to it.
That’s it. Now, the “Priority Field” should appear in your Mail toolbar every time you open a message. It will usually appear to the right side of the “Subject” field.