Is there a simple way that I'm missing to crop a photo taken in portrait orientation to landscape? I have photos of my kids that I want to crop to landscape to use as wallpapers on my MacBook Air. I see I can rotate them 90 degrees, but then they're sideways, and I can't use the spin to rotate feature to move it more than 45 degrees or so. I see I can also choose the different aspect ratios, but none that will easily let me turn it to landscape.