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The image size box in Photoshop showing an image of some hills

The image size box in Photoshop showing an image of some hills

Resizing images in Photoshop is a basic yet important technique for every photographer to learn; one that you’ll undoubtedly use over and over again as you share your images in both physical and digital formats. 

Whether you’re downsizing to share images online or upscaling them to make larger prints than is possible at the native resolution of your camera, there are simple processes that need to be followed to ensure that image size and quality are maximized. And we’ve got them covered in this guide showing you how to resize your photos in Photoshop. 

To make sure that you know the process inside out, we’ll show you how to correctly downsize your images and change the color space to one that’s used for sharing images online. 

We’ll then take you through the process of enlarging a high-resolution image to make larger prints possible, including basic sharpening to account for the small loss of sharpness you typically experience when enlarging images. 

To resize an image, go to Image>Image Size or use the shortcut Ctrl+Alt+I to open the Image size dialogue. The first thing you need to make sure of is that the Resample box is checked, otherwise the Resolution will increase as the Width or Height are adjusted, so the image essentially remains the same size.

You can set the dropdown menu next to Resample to ‘Automatic’ or ‘Bicubic Sharper (reduction)’. Next, make sure the desired unit of measurement is set – we used Pixels here – and then set the reduced size of the longest edge of the image. 

For this shot here, the long edge is Width so this was set to 1000px to make it a small size for email or sharing on social media.

Different color spaces work best for different outputs, so if you’re sharing an image online the best color space is sRGB, while for print it’s Adobe RGB 1998. 

SRGB is a smaller space made up of fewer colors than Adobe RGB 1998, so it’s generally best to save camera JPEGs or output processed Raw files in the latter and convert to sRGB when you plan to share images online.

To change the color space, go to Edit>Convert to Profile. When the dialogue opens use all of the default settings but change the Destination Space to sRGB IEC61966-2.1 if you’re sharing an image online. If you’re printing the image and simply reducing the file size, leave the color space as Adobe RGB 1998.



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