Why change the size of an image? Being able to change the image size is essential in many areas. The size of an image significantly determines its quality, loading time, and display. Smaller ...

It's considered a resolution-independent file format, because you can scale the image up to any size without losing image quality.

Click OK. Save the image. In step 2 above, you might change both resolution and unit dimensions if you know the output size and required resolution.