Change the stack orientation

Expression Studio 2.0

This page applies to WPF and Silverlight 2

By default, the elements within a stack panel in Microsoft Expression Blend are stacked vertically, but you can also stack them horizontally.

To change the stack orientation of an element in a stack panel

Click a stack panel in your Expression Blend document, to select it.
Under Layout in the Properties panel, set the Orientation to either Horizontal or Vertical.