3D Drawing with AutoCAD - Section 8

34.1.5 Vista

With the “View” button, the UCS uses the point of origin that it currently has, but reorients its axes until they are classically aligned to the screen. That is, X to the right, Y up, and Z toward you, regardless of the model's position, so the XY plane, or any other plane, may not match any face on your model, unless you were using a orthogonal view of it.

34.1.6 Rotate shafts

If the point of origin of a SCP is correct for its purposes, but not the orientation of its axes, you can rotate it with respect to any of them. To do this, the Coordinates section of the Ribbon View tab has one button per axis.
To know where the angles of rotation about the chosen axis are positive, we can use the "Right Hand Rule", which consists of pointing the thumb of your right hand on the positive side of said axis. By closing your fingers on your palm you will know the positive direction of rotation. This rule never fails.
Let's see the following example where the direction of orientation of the X and Y axes are wrong for the purposes it pursues, so you must apply the right hand rule on the Z axis, so your thumb should point up. When you close your fingers on your palm you will see clearly the positive direction of rotation, which you should not forget is never anti-clockwise if you look at the XY plane.

34.1.7 The SCP command

The SCP command summarizes the above options into one. It can be executed from a button of the section that we are studying, or we can write SCP directly in the window of commands. The only thing that we must emphasize here is that we can see the different alternatives to create our SCP between the options that appear in the window.

34.1.8 Clips of the SCP icon

A recent addition of Autocad to the creation of Personal Coordinate Systems is the use of grips on the SCP icon itself. When you click on it, you will see 4 grips, one of them on the point of origin that will allow us to move with the cursor said point to any other on screen, being able to use of course, references to objects. The other three grips are at the ends of each axis, so we can take them with the cursor and change their direction. Obviously, since the Z axis will always be perpendicular to the XY plane, just as the X axis will always be perpendicular to the YZ plane and the Y axis to the XZ plane, by changing the direction of any axis, the rest moves accordingly.
Finally, when you point to the mouse with any of the SCP icon's grips, you will see the contextual menu that corresponds to it, since it is a multifunctional grip, as we studied in the section 19.2.