The point tool allows you to position a single point relative to plots that exist in the visualization window. The point tool provides one hot point at the tool's origin. Clicking on the hot point and moving the mouse moves the point tool's origin in a plane perpendicular to the screen. Holding down the Shift key before clicking on the hot point moves the point tool's origin along the plot axis that most faces the user. Holding down the Ctrl key moves the point tool along the plot axis that points up. Figure %s <pointtool> shows the point tool being used to set the origin for the ThreeSlice operator.
Point tool