Using The Footswitch/Tuner FT01 : - note 1 - note 2 - note 3 - note 4 - note 5   Note 2:   The numbers 1 thru 6 are lit to indicate tuner mode.   The tuner is optimised for tuning open strings 1(E) 2(B) 3(G) 4(D) 5(A) 6(E)   When a string is plucked, the corresponding number will flash for 2 secs.   The string pitch is then represented by a rotating wheel whose direction shows if the string is sharp or flat.