Leica FlexLine TS02 User Manual page 34

Operation
5. Center the electronic level for the second
axis by turning the last footscrew. An arrow
shows the direction of rotation required.
When the electronic level is centered the
arrow is replaced by a checkmark.

When the electronic level is
centered and three checkmarks
are shown, the instrument has
been perfectly levelled up.
6. Accept with OK.
FlexLine, 34