I have a Mac and Lightroom 4 and a full frame camera Nikon D700
Wishing to upload a photo to my lab for a photo to be printed at 10 x 8
Using Lightroom what should the aspect ratio be.
Do I choose from Width & Height, Long Edge, Dimensions, or Megapixels?
And what image size do I enter to achieve the 10 x 8?
Do I check or uncheck resize to fit size within the export Module of Lightroom?