...
The following limitations apply to Chord Diagrams:
They cannot be defined as a Parent Chart
Vertical lines cannot be applied to the chart cell
Y axis zooming cannot be selected
Trend lines cannot be added
Targets cannot be specified
‘Show Data Values Outside Chart’ cannot be selected
You will not be able to enter a label for:
Legend
X Axis
You will not be able to hide:
Legend
X Axis
You will not be able to specify lengths for:
Legend items
X Axis label
Linking Y Axis is not available