The signal assignment to each element in the bar display can be done in the dialog Bar values of the display settings.

Id

Complies with the position on the base axis

Width

Bar width

Signal

Bar value (signal that controls the bar value). You can drag and drop the signals from the signal tree into the signal column. Multiple selection is also possible.

Grid line

Displays vertical grid lines (This column is only shown in relative mode of the axis.)

Restrict base axis labels to grid line

If this option is enabled, the base axis value on the gridline is shown. If no gridline is chosen, no base axis value is displayed. (This column is only shown in relative mode of the axis.)