How to set up the setting of web file

a) Viewing the type and size of the original file.

b) Viewing an optimized web file, the type, quality and size of file is show. The download rate can be set and you can know the downloading time.

c) Viewing 2-up to compare the original image and the web image.

d) Viewing 4-up to compare each others and choose the one that you want to save for web file.