Work Plane Zero Point and Guidelines in Modeling

The coordinates of guidelines (Image 01) to be specified in the "New Guideline" dialog box under "Parameters" refer to the zero point of the work plane.

1 Coordinates of Guideline (Marked in Red)

You can set the zero point of the work plane in the "Work Plane and Grid/Snap" dialog box (Image 02) using the menu Tools → Select Work Plane → Set Origin or the corresponding button in the toolbar.

2 Zero Point of Work Plane (Marked in Red)

In the video, the zero point of the work plane is set to the coordinates X = 3 m, Y = 5 m, and Z = 0 m. Then, a guideline is created parallel to X (|| to X) with the coordinate y1 = 0 m. Thus, the guideline is in the global coordinate system at Y = 5 m.