The following shortcut key combinations can be used when you work in the XML Designer.
When you select Visual C# Development Settings in the Import and Export Settings Wizard, the Visual C# 2005 keyboard mapping scheme is applied. Visual C# 2005 is the current keyboard mapping scheme. This is the keyboard mapping scheme that is applied to the integrated development environment (IDE) at initial startup. For more information, see How to: Change Select Settings.
To switch to the Visual C# keyboard mapping scheme
On the Tools menu, click Options.
Expand Environment, and then click Keyboard.
Select Visual C# 2005 from the Apply the following application keyboard mapping scheme drop-down list.
CTRL + MINUS (-)
Collapses nested elements. Available only in Schema View of the XML Designer.
CTRL + EQUALS (=)
Expands nested elements. Available only in Schema View of the XML Designer.