I’ve been using Omnigraffle for a few years now. But I only recently managed to crop images directly in it. It’s definitely useful, as it avoids opening Photoshop and lets you try different alternatives directly on your wireframe. It was quite evident in Visio, but quite hard to find in Omnigraffle, which makes it kind of a secret. Here is a few steps tutorial to learn how to crop images in Omnigraffle.

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