Sony PCG-XG18 Primary User Manual page 94

To change the window design of Sony software:
Click the Start button, point to Settings, and then click Control Panel.
Double-click UI Design Selector.
Click <<or>> and select the desired design.
Click Apply. The "UI Design Selector" window design changes. The
window design for you software will match the "UI Design Selector"
window.
To try another selection, click <<or>>.
Click OK. The UI Design Selector closes and the window design of
your Sony software displays.