I have Lightroom CC and am new to it. I cannot find a way to change the dpi. A brief glance at on-line info (haven't had a chance to go through tutorials yet) says you can do this with "export." I cannot find "export" anywhere. I can only find "Save to" which sees to save everything at 240dpi, and I can't change that -- can only change the pixel size across longest side as a custom sizing.