To Define a Reference Point
At the Command prompt, enter
AMPSNAPREF
.
Specify a reference point.
Specify a relative point.
Now you can use this point as a base point for specifying a relative point.
Related Concepts
About Virtual Snap Points
Related Tasks
To Define the Center Point of a Rectangle
To Define the Midpoint Between Two Points
To Define a Point Relative to the Last Entered Point
To Define a Virtual Intersection Point Between Two Lines
Related Reference
AutoCAD Mechanical Commands for Working with Object Snaps