Resize pixel size
Width:
Suppose height is not defined, then the new height value will be calculated automatically.
Height:
If width not defined, then the new width value will be calculated automatically. The aspect ratio is saved.
Set maximum pixel width/height
Scales down improved image width if it is more than Max Width value. (aspect ratio saved).
Scales down improved image height if it is more than Max Height value. (aspect ratio saved)
Maximum width for landscape image [width > height]. It doesn't affect to portrait images. (aspect ratio saved)
Maximum height for portrait image [height > width]. It doesn't affect to landscape images. (aspect ratio saved)