The usage method is as follows:

1. Suppose you draw such a picture.

2. First use the shortcut key UCS- SPACEBAR.

3. Then make a choice according to the following prompts. You can choose ob (of course, you can also choose others, this is according to your own needs)-the space bar.

4. Select objects aligned with UCS to change the direction.

5. Or create a layout box.

6. Draw a line along the direction to be transformed, and specify points on the X axis and the XY plane.

7. You can see that the coordinates in the two layouts are different. This is how to use UCS.

Extended data:

circular cylindrical coordinates

Cylindrical coordinates (ρ, θ, z) are expressions of points in cylindrical coordinates. Let P(x, y, z) be a point in space, then the point p can also be determined by these three ordered numbers ρ, θ, z, where ρ is the distance between the projection m of the point p on the xoy plane and the origin, and θ is the included angle between the projection MO of the directed line segment PO on the xoy plane and the positive direction of the X axis. The coordinate correspondence between the points in the cylindrical coordinate system and the three-dimensional Cartesian coordinate system is x=ρcosθ, y=ρsinθ, and Z = z