A method of synchronizing the change of digits in the indicator of absolute-value measuring devices. The method makes use of three possible electrical signals of different amplitude level obtained from scanning at least one track of markings subdividing the track to a certain degree of fineness, and of a control signal obtained from scanning a track of higher fineness. The combined signals control a threshold value discriminator of which the output signal is used for changing the digits. An apparatus for practicing the method comprises a displaceable record carrier having tracks of different degrees of fineness thereon with only one sensing means associated with each track. Each sensing means is connected to a summing circuit stage which, further, is in connection with the sensing means associated with the track of higher fineness. The summing circuit stage is, in turn, connected to the threshold value discriminator.