I've tried to sharpen images as was shown coreldraw with an auto sharpen today but the unsharp mask doesn't appear to work that well. Am I missing something or is there an auto sharpen I could use?
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Sorry for not mentioning it. I have photoshop CC 2017.
To expand more on my problem - I have created 300dpi designs and when I go to sharpen, the image is still a bit 'jaggered' around the edges. I set it to 100%, 0.3, 0 and then tried moving those to see if it made a difference but it seemed to stay similar on the preview. This is the result I'm getting.