In the settings panel of the Term Structure graph, users can Add Additional Dates to compare term structures of Implied Volatility against prior days, as measured at close

For example, users can select a date from the week prior, showing how the Term Structure has shifted over the previous week, and indicating whether the market’s expectation of volatility has increased or decreased in this time period.

When viewing the Term Structure with the Days to Expiration tab selected at the top of the settings window, we can see the same customizations are possible, with the exception of the Economic Events Overlay.