a. Drag anchor to resize a layer;
b. Shift + Drag anchor to resize a layer with constrain of aspect ratio;
c. Alt + Drag anchor to resize a copy of layer;
d. Set Width, Height property in toolbox directly;
a. Ctrl + Drag anchor to resize a layer smartly;
b. Ctrl + Shift + Drag anchor to resize a layer smartly with constrain of aspect ratio;
c. Ctrl + Alt + Drag anchor to resize a copy of layer smartly;