From BlenderWiki

Transform Control

Transform controls can be used to modify and controls the effects of the available transformations.

The following pages detail the available control options:

Transformation Amount

• Precision of Transformations
• Numeric Transformations
• Transform Properties
• Reset Object Transforms
• Proportional Edit

Transformation Orientation

• Manipulators
• Transform Orientations
• Axis Locking

Transformation Center

• Pivot Point
• Active object
• Individual Centers
• 3D Cursor
• Median Point
• Bounding Box Center

Transformation Snapping

• Snapping Transformations
• Snap to Mesh