Resize Image

Width and Height
The width and height of the new size of image in pixel (up to 1600x1600) is also shown in percentage.
Aspect ratio is the relationship of the image's width to height. If you want to retain the original proportions when resizing, select the check box "Keep aspect ratio".

Resample Method
You can choose the method image resampling.

Nearest, is a less precise method. Recommended for use with images containing non-anti-aliased edges or to preserve hard edges.

Linear, is a medium quality method. Recommended for to reduce the size of an image.

Smooth, is a precise method, but produces very blurred edges.

Anti-aliased, is a very precise method, resulting in the smoothest tonal gradations. Use this resample when you enlarge an image.

Only the background is resized. For to resize the layers, flatten them at first.