1.) Place cursor in the white box.

2.) Press "Return" to highlight your cursor.

3.) Press "CMD +A" to highlight the code.

4.) Press "CMD +C" to copy the code.

5.) Now go to "Mail" then click on "Settings" then on "Signature".

6.) Place cursor in the top left corner of the sig box.

7.) Press "CMD +V" to paste the code into your sig box.

8.) Click "done".

9.) Now click on "write" to see your email page.