Locations of PowerPoint 2003 commands in PowerPoint 2007 : Drawing Canvas

PowerPoint 2003 Location	PowerPoint 2007 Location
Fit	Office Button | PowerPoint Options | Customize | All Commands | Fit
Expand	Office Button | PowerPoint Options | Customize | All Commands | Expand
Scale Drawing	Office Button | PowerPoint Options | Customize | All Commands | Scale Drawing

Source: Microsoft (http://www.microsoft.com/)