UCS command "3" selecting points

In the UCS command entering 3 to select x, y, and z at any corner of a 3D rectangle while in the SW Isometric view, results in the Z axis being perpetually in the vertical position, at either a positive or negative direction. I am entering the x-positive and y-positive axis in the correct formats.

Is there some form of magical manuever I need to get this working the correct way?

BIGMIKE, I think you're misunderstanding the intent of the '3' option of the UCS command. The three points are used to define a plane (and new coordinate system) by establishing the X axis with the first two, then the Y axis with the third. The Z axis will always be perpendicular to the subsequent new plane.

I am following a CAD-Guy tutorial where I am supposed to draw rectangles on the four sides of an extruded rectangle. I just DL AutoCAD 2010 and gave it the same application as in my 2006 exercise and was able to locate all six sides of the box. I will give it a look see on Sunday morning. Thanks for your input.

I Selected The New Origin Point, The Pos X, And Then The Pos Y Ending Up With This Pic. Take A Look At The Cursor Too.

In this case your Y axis should be directly above the second point of the positive X axis. If not you will have your Y axis at some angle.

Starting with AutoCad 2007 came the Dynamic USC that made things a little easier.

KC