Resizing Images Using Lightroom

Resizing images using Lightroom is done when exporting.This tutorial shows you exactly how to resize your image by exporting it. Most of the time images are resized in order to share photos online for viewing on a screen. If you want to resize for printing then this should be done in the print module.

Why is it important to resize?

  1. Many sites wont allow you to upload big images.
  2. Many social media sites like Facebook will resize large images if you attempt to upload them. This often effects the quality so it is better to resize them yourself in order to get maximum quality.

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Instructions for Resizing Images Using Lightroom

Select the image(s) that you want to re-size.

Choose File / Export from the menu and scroll down to the File Setting section as shown below.

File Settings

Image Format

The image format should be set to JPEG.

Color Space

The color space should be set to sRGB.

Quality

The setting that you use for quality makes a huge difference to the size of the resulting image. When resizing for display on a computer screen there should rarely be any need to set this above 80. Never set this to 100 as this results in huge image sizes.

Take a look at the three images below. There is little noticeable difference in quality but the image size is dramatically different.

Quality: 100  Resulting File Size: 612 KBQuality: 100 Resulting File Size: 612 KB Quality: 80  Resulting File Size: 287 KBQuality: 80 Resulting File Size: 287 KB Quality: 60 Resulting File Size: 138 KBQuality: 60 Resulting File Size: 138 KB

Limit File Size to

Limit File Size to shold not be checked.

Image Sizing

Resize to Fit

Tick Resize to fit and select “Long Edge” from the dropdown. Set this to be whatever size you want the width of the image to be. This is typically 1024 pixels on the web.

 

Resolution

Resolution makes no difference when displaying images on a screen. The photo below was exported at 300 PPI, the one below that was exported at 1 PPI. As you can see, there is no difference.

Quality: 80, Resolution 300 PPI,  Resulting File Size: 287 KBQuality: 80, Resolution 300 PPI, Resulting File Size: 287 KB Quality: 80, Resolution 1 PPI,  Resulting File Size: 287 KBQuality: 80, Resolution 1 PPI, Resulting File Size: 287 KB

Output Sharpening

“Sharpen for” should be set to screen with the amount set to high.

Metadata

Set Metadata to include Copyright and contact Info Only. this will reduce the size of your image by not adding unnecessary metadata.