Save time and space by resizing images.
It’s easy to resize an image in Photoshop without losing quality by adjusting the pixel dimensions. Large photos or those with a high resolution — images with a greater number of pixels — can take a long time to download and require a large amount of space to store. When you want to send an image for someone to glance at, or you need a photo to post on a digital platform, a lower-resolution image with a smaller file size is essential.
How resolution relates to file size.
The higher the resolution, the more detail an image has, and the bigger an image file is — because it’s denser with data. One way to shrink a file size is to lower the resolution, which doesn’t have to change the image dimensions. If you keep the resample box checked as you resize the image in Photoshop, the software will change the amount of pixel data inside of it. This shrinks the file size but keeps the dimensions — or document size — the same.