Status bar > Coordinate Display area
The Coordinate Display area shows the position of the cursor or the status of a transform, and allows entry of new transform values.

The information in these fields varies, depending on what you are doing:
When you are simply moving the mouse in a viewport, these fields show the current cursor location in absolute world coordinates.
While you are creating an object, these fields also show the current cursor location in absolute world coordinates.
While you are transforming an object by dragging in a viewport, these fields always show coordinates relative to the object's coordinates before the transformation was started.
While you are transforming an object, these fields change to spinners, and you can type values directly in them, as described below in “Using the Coordinate Display for Transform Type-In.” This is an easy alternative to using the Transform Type-In dialog.
While a transform button is active and a single object is selected, but you are not dragging the object, these fields show the absolute coordinates for the current transform. See “Interface,” below.
While a transform button is active and multiple objects are selected, these fields are blank.
When no object is selected and the cursor is not over the active viewport, these fields are blank.

When you are transforming an object, you can type coordinates directly in the Coordinate Display fields. You can do this in two modes, Absolute or Offset.
Click the Absolute or Offset button to toggle between the modes:
While you are typing in the Coordinate Display fields (X,Y,Z), you can use the Tab key to move from one coordinate field to another.
When you transform an object, the information shown by these fields depends on the type of transform:
Move displays the offset XYZ coordinates based on the current coordinate system. For example, if you're moving an object and you're constrained to the X axis, only the X readout will change, displaying the offset of the move along the local X axis.
Rotate displays the offset angle in degrees about the axis or axes the rotation is performed around. This is dependent on both the axis coordinate system, and the local/center toggle button.
You can get the absolute as well as offset information through the Transform Type-In dialog available from the Tools menu or by right-clicking a transform button that has been selected on the toolbar.