Adobe Illustrator CC 2015 - Manual (Page 130)

125
Drawing
Last updated 6/5/2015
If you shift the origin, the x and y coordinates of the horizontal plane and the x coordinate of vertical planes are affected.
When you select an object in perspective while the grid is visible, the x and y coordinates displayed in the Transform
and Info panels change with shift in origin. You can also see the change in coordinate measurements when you draw
objects using the rectangle or line group tools and press Shift, while the relevant grid plane is active. If you move the
mouse over the origin, the pointer changes to
.
Note: If you move the ruler origin, you can see the station point.
A Station Point B Changed Ruler Origin
Adjust horizon height to fine-tune the observer's eye-level. When you move the pointer over the horizon line, the
pointer changes to a vertical two-way arrow
.