If you click on the Tools menu, you’ll see an option labelled Find. If you click on Find, it will expand like the figure below:

 

 

Using this menu, you can choose whether to use the Find window or to do an advanced find. (We’ll talk about how to use those options in a moment.) If you’re in a mail window and you have a message selected, you’ll also have the option to do one of two simple searches: to find messages related to the one you’ve selected, or to find messages from the same sender.