How to Change Picture Pixel Size on Mac

If you need to reduce the size of an image for web use, email, or a printed piece, GIMP is a great tool to use. In this tutorial, we will show you how to change picture pixel size using GIMP on your Mac.

First, open GIMP and select the image you want to edit by going to File > Open. Then, click on Image > Scale Image to bring up the Scale Image dialog box. Here, you can enter new image size dimensions and resolution values.

For example, let's say you want to reduce an image from its original 300 ppi to a smaller size of 72 ppi with a pixel dimension of 600 x 400 pixels. Enter these values in the dialog box, making sure to select the desired resampling method. There are several options available, including Bicubic and Lanczos3.

Bicubic is a fast and effective method that discards any unused pixels in order to reduce the image. Lanczos3, on the other hand, uses the Sinc mathematical function and performs high-quality interpolation, but it may take longer to complete.

Once you've selected your resampling method, click OK to apply the changes. Your image will be resized accordingly, and you can save it as a new file or overwrite the original.

It's also worth noting that when enlarging images, it's recommended to clean up any dust or scratches before doing so, as these may become more noticeable in the enlarged image.

By following these simple steps, you can easily change picture pixel size using GIMP on your Mac.

How to change picture pixel size on mac