Resizing in Lightroom

  • In the Library view, click on “Export…” In the “File Settings” section:
    • Set “Image Format” to “JPEG”
    • Set “Quality” to 100. (If the image is being resized down to the target dimensions this is unlikely to be a problem in terms of file size)
    • Set “Color Space” to “sRGB”
    • Ensure “Limit File Size To:” is un-checked
  • In the Image Sizing section:
    • Ensure “Resize to Fit” is checked
    • Choose the “Width & Height” option
    • Set the “W:” and “H:” values to e.g. 1600 and 1200, and the units to “pixels”
    • Set “Resolution” to 300 pixels per inch
    • Ensure “Don’t Enlarge” is checked
  • You may then want to save those settings as a Preset (use the “Add” button below the Preset pane on the left)
  • Note that setting both the width and the height is correct, irrespective of the image’s aspect ratio
    • Lightroom will adjust both the height and the width together (maintaining the aspect ratio) ensuring that neither is too big