In addition to the standard styling properties, the width and height of a 
Panel Control can be configured in its 
Styling Assistant.
There are three ways to set the width of a Panel Control:
- Specific Value choose both the unit and number.
- Minimum as wide as the Control needs to be to contain its children.
- Maximum as wide as its parent's width.
The height of a Panel Control will automatically stretch to contain its children unless you specify a value.
