You can find instructions here to access the settings for the Need4Viz charts : Format Custom Element.
For the Double Sankeys chart, the available settings are:
Global
Extended parameters
Global → See the user guide for the “Global” section
here
Menu → See the user guide for the “Menu” section
here
Options
Placement : This setting allows you to define the spacing between dimensions and measures (to adjust global display of the chart).
Colors : Set here the hover color of the hovered dimension (text and outline of bars in both sankeys)
Hovering : Define here the hovering color and text highlighting mode.
Horizontal break : Set here the style of the horizontal break line.
Vertical break : Set here the style of the vertical break line.
Selection → See the user guide for the “Selection” section
here
Controls → See the user guide for the “Selection” section
here
Tooltip → See the user guide for the “Tooltip” section
here
Dimension_1 and 2
Header : This setting allows you to define the format of the header values as well as the desired writing style.
Labels : This setting allows you to define the format of the label values as well as the desired writing style.
Measure_1 and 2
Label : This setting allows you to choose the header of the measure (%SECTION% N4V variable can be used in the label) as well as the desired writing style.
Value : This setting allows you to specify the unit to add as a measurement prefix or suffix as well as the number of decimal for measure and percentage. It also allows you to display or not the percentage and to choose the writing style. The measurement display format (standard - e.g.: 2,345.67, compact - e.g.: 2.3K or compact long - e.g.: 2.3 thousand) can also be defined.
Export Server → See the user guide for the “Export Server” section here
Export FTP → See the user guide for the “Export FTP” section here
Export SharePoint → See the user guide for the “Export SharePoint” section here