Tracking, Kerning, And Leading On The Fly!
After you set some text, you can adjust the spacing between all the letters, specific letters, or even the spacing between lines of text. Highlight all the text, then press-and-hold the Option (PC: Alt) key while pressing the Left and Right Arrow keys to adjust the tracking or the Up and Down Arrow keys to adjust the leading. Kerning can be adjusted by placing your cursor between two letters and then holding the Option (PC: Alt) key and pressing the Left Arrow or Right Arrow key.
by Corey Barker