Add the option to hide markers on scatter graph and only show the line connectors. Currently, markers can only be displayed in the background, made very small and have relatively innocuous shapes assigned to them but this creates an untidy appearance. To create visualisations like Gantt Charts, there are good work-arounds by manipulating Scatter Charts (e.g. https://community.tibco.com/wiki/tibco-spotfirer-tipstricks-how-create-gantt-chart-visualization) but they are limited by the fact that the data points are still visible.