Within the Settings window, there are three ways to view the impact of skew in this chart, starting with Moneyness as a default showing Implied Volatility by the percent in or out of the money each strike is compared to the current pricing.

Selecting Fixed Strike replaces the X-Axis with the actual strike prices at the bottom instead of as a percentage representation.

Lastly, choosing Delta as the X axis, the chart shows Implied Volatility across option delta values.