To Create an Offset from an Element, Along the X or Y Axis

With a tool active, use AccuSnap to display a tentative point at the required point on the element (or place it manually).
Press the <O> shortcut key.
The compass moves to the tentative point location.
Move the pointer so that it is indexed on the required X or Y axis.
This sets the focus automatically to the indexed axis.
Key in the required distance.
With the pointer still indexed to the axis, accept with a data point.

Creating an Offset along the X or Y Axis