Multiple Coordinate Systems

While many sketches require at most one coordinate system, you can create more than one coordinate system if you wish. You might want more than one coordinate system to compare objects—the coordinates of a point or the plot of a function—in the two systems.

When you have more than one coordinate system, only one of those systems is the marked or active coordinate system. The marked coordinate system is the one that’s used for plotting points and functions and for measurements such as coordinates or slope that require a coordinate system. To change which coordinate system is marked in your sketch:

1. Select the coordinate system you wish to mark by clicking at a grid intersection or on its origin, unit point, or either axis.

2. Choose Mark Coordinate System from the Graph menu.