Isn't Doctype for web design? Where will my photoshop questions go? and isn't photography for photographers?
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If it's about Photoshop usage in general then http://superuser.com/ should accept your question.
If your question is about using Photoshop to make Web Design, Doctype is the place to ask your question.
For photographic editing, there is the website Photography and Photographic Editing that is in open beta. As long as it is related to editing image, I think it will be on-topic for that site.