Spectra Precision FAST Survey Reference Manual - Manual (Page 229)

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 Add (Spiral Only):
The Spiral Only element will handle a spiral between any line and arc segment (e.g.
line-spiral-arc or arc-spiral-arc).
 Pick PL
: This option is only visible if you Clear the dialog. With this option, you can pick a centerline from any
screen polyline, including polylines with arcs. When you choose Pick PL, you are immediately presented with the
graphic screen, where you can pan by dragging your finger across the screen, or zoom using the many zoom
options. You can choose not to select a polyline (maybe there were none to select!) by pressing OK or Enter.
When you select a polyline, it will highlight as a darkened polyline. After selecting a polyline and pressing OK or
Enter
you will see the polyline elements. Note that if you change the start station to 500, all the stationing for the
polyline elements will change accordingly. This is also true regarding the starting northing and easting. If these are
changed, all element coordinates will change accordingly, as can be verified using the Edit option.