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Poster-300dpi & CMYK
Hi,
I’m a complete photoshop newbie, so please pardon my ignorance. I have a movie poster that I wanted to get printed out. My friend advised me 2 things:
1. Uprez the image to 300dpi.
2. Convert image from RGB to CMYK.#1 is easy. #2 seems a bit complicated. Here is a screenshot of my color settings:

I also went to Image>Mode>CMYK color is checked. Is this correct?
Any info much appreciated!
Alexander