Join waveforms in the groups in order to control the amplitude simultaneously for all waveforms within the group. The choices are: free, column, row, arbitrary group X, Y, Z. The symbol of the group will be displayed on the left margin of the window, near the lower part of the amplitude axis.

If the current waveform is not the first member of the group, its maximum amplitude will automatically be adjusted to the value defined by the group members.

Max amplitude change of any member of a group propagates to the remaining members.