Leica TS11 User Manual page 90

TS11/TS15, Check & Adjust
Next step
IF the results are
to be stored
to be determined
again
THEN
Next overwrites the old tilting axis error with the new one.
Redo rejects the new determined tilting axis error and repeats
the whole procedure. Refer to paragraph "Determination of
tilting axis error step-by-step".
90