This property specifies the value of the ActionScript property
Stage.scaleMode. If it is not null, Stage.scaleMode is set to (the
string representation of) this value.
It can take any of the following values:
- ShowAll – make the content the biggest and completely within
the area while keeping the aspect ratio.
- NoBorder – make the content the smallest and covering the
entire area while keeping the aspect ratio.
- ExactFit – scale the content possibly with distortion to fit
the entire area.
- NoScale – no scaling.