TIP: The Hidden Options Bar Pop-Down Menu

Here's the problem: Let's say you're using Free Tranform, and you want to type in a particular Width or Height up in the Options Bar. You want your Width to be 3.375 inches, but even though your default unit of measure is Inches, the fields in the Options Bar are in pixel (Don't ask me why Photoshop does that, but it does). Of course, if you knew the two-letter code, you could type in 3.375in (for inches), but there’s an even easier way (and you don’t have to memorize any abbreviations). Just type in your number, then Control-click (PC: Right-click) in the Width field and a pop-up list of measurement units will appear (as shown). Just choose the one you want from that list, and you're set. Of course, this works for the Height measurement, too.