Spectra Precision Survey Pro CE v3.80 Ranger GPS Reference Manual - Manual (Page 60)

GPS Reference Manual
60
$FFHSW : Updates the projection with the vertical solution calculated
from the control point observation and updates the base point
elevation coordinate. When the horizontal projection is not solved,
and the dialog is used only to occupy a vertical control point, the
$FFHSW button simply closes the dialog.
2FFXS\ %HQFKPDUN : opens the Occupy Control Point screen (Page R-
32) where the measurement is taken by the rover on the remote
benchmark. The
New Elevation field of the Remote Elevation screen
will then display the new elevation for the base point.