Vertical line that follows cursor location in scatter plot or line chart


I have a dashboard where I am plotting some statistics with a scatter plot, with dates on the x-axis. Is there a way to add a feature to the visualization such that there is a vertical line at wherever my cursor is on the scatter plot, so that I and people I meet with can immediately see on which dates features of interest occur? (Currently we squint and read dates, which is fine, but it occurred to me that this would be a very nice little polishing feature on this dashboard.)

In case version info is relevant, I am using Tibco Spotfire Analyst 7.8.1.


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