Spectra Precision Survey Pro v4.5 Recon and Nomad Reference Manual - Manual (Page 263)

R-255
Leveling Menu
The Leveling Menu replaces the Survey Menu when running in
leveling mode. It contains routines to perform a level loop or 2-peg
test.
A: Select/Create Loop
B: Level
C: 2 Peg Test
D: Remote Control