Step1. Click to edit window, then click to resize page.
2. Image size is original size, can not be adjusted, output size is you output image's size, adjustable.
3. Interpolation methods comprise three mode, smooth, sharpen and sawtooth.
Smooth--> Smooth edge without sawtooth, make picture looks vaguer.
Sharpen--> Its effect is very good, between smooth and sawtooth, picture is distinct. This is a popular way.
Sawtooth--> strong contrast, distinct picture, but you may lose some details.
to edit window, then click 
to resize page. 
