In synchronous modeling, moving the sketch plane origin also moves the grid origin. You also can change the grid angle.
Use a drawing command, such as the Line command, to lock the sketch plane where you want to move the origin point.
Choose the Reposition Origin command 
.
Tip:
The sketch plane lock icon must be displayed in the graphics window before you can use the Reposition Origin command.
Click the origin of the steering wheel (A).
Click a new location for the origin point (B).
The location point can be any point, keypoint, or edge. Valid keypoints include Point On Element keypoints.
The origin X and Y intersecting lines are moved to the new location. When you select a sketching command, you can see the coordinate readout is reset to zero (C).
Tip:
You can use the grid intersections to define a new origin point if the Snap To Grid option is set on the Grid Options dialog box.
Choose the Reposition Origin command .
Tip:
The sketch plane lock icon must be displayed in the graphics window before you can use the Reposition Origin command.
Click the torus of the steering wheel.
Specify the grid angle by typing a value in the box (A) or by clicking in the graphics window (B).
The grid angle display aligns with the change in the sketch plane X and Y axes.
Tip:
When moving the sketch plane origin, you also can change the sketch plane orientation to keep dimensions horizontal and vertical with respect to coplanar geometry that has a different orientation. Click the steering wheel torus, and then click a sketch element or model edge to align the X axes.
To see an example, see Set sketch plane horizontal and vertical for dimensioning.
You can use the Zero Origin command to automatically reset the sketch plane origin to the center of the currently locked sketch plane, which is the (0,0,0) coordinate.