section 2 describes how to scale the canvas and how to slice off high resolution web graphics
Creating optimized Web Graphics
This tutorial describes about different web graphic types and discuss about different options to resize/compress image for the better web experience so that on web page image renders with high speed and good quality.videos also describe that which specific type of image should use w.r.t to specific requirements for example for pictures .jpeg is better but for logos,backgrounds and transparency .png is better.For animation .gif is better.
Design Aesthetics
1) First describes the basics of aesthetics and shows some real life examples.