Elevation movements in Listing's Plane rotate about which axis?

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Multiple Choice

Elevation movements in Listing's Plane rotate about which axis?

Explanation:
Elevation movements are a tilt up or down of the globe, which is achieved by rotating the eye about a horizontal axis that runs left to right. In the Listing’s plane framework, this horizontal axis is the X axis. Rotating around this axis moves the eye in elevation without introducing torsion or rotation about the line of sight, which would happen if the axis were vertical or along the depth direction. So looking up or down from Listing’s plane uses rotation about the X axis.

Elevation movements are a tilt up or down of the globe, which is achieved by rotating the eye about a horizontal axis that runs left to right. In the Listing’s plane framework, this horizontal axis is the X axis. Rotating around this axis moves the eye in elevation without introducing torsion or rotation about the line of sight, which would happen if the axis were vertical or along the depth direction. So looking up or down from Listing’s plane uses rotation about the X axis.

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