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# 2.2.13.3.1 Common Track Object Fields

End Pt 1
  For the starting position (or first point) - altering this value causes the whole object to move relative to the layout origin. This can only be changed if the track is unconnected at that end. The elevation is shown beneath the X,Y as a read-only Z value.
End Pt 2
  The end position (or second point), altering this, moves just that end of the line, altering its length as needed. This can only be changed if the track is unconnected at that end. The elevation is shown beneath the X,Y as a read-only Z value.
Grade
  The calculated grade between the two end-points
Layer
  The layer of the object. The object can be moved between layers if the layer is not frozen. Only non-frozen layers are listed as options.
Length
  The length of the track object. This can be set for a Straight Track if it is not connected, and will respect the value of the Pivot field.
Pivot
  The Pivot control can be set to fix in place the start, or the middle or the end, and it applies to the Length, Track Angle and Angular Length controls. When these are changed the new dimensions are applied so as to keep the locked position in place.