# Rotation:X Axis Specify

[Rotation:X Axis Specify] command updates CPlane by the steps:

- Determine the origin of CPlane
- Determine X-axis of CPlane

## Step 1

While Specify the origin of CPlane prompt is displayed, specify a new origin of CPlane.

## Step 2

While Specify X Axis prompt is displayed, specify a new X-axis direction of CPlane. The straight line from the origin specified in Step 1 to the point in this procedure is X-axis of the updated CPlane.

In the screen preview, updated X and Y-axis are dynamically displayed accorging to the mouse cursor movement.