Sometimes you need to define a conversion where some steps are optional. For example, a funnel has steps A, B, C, and D, where B is optional. If a user performs steps A, C, and D, they still convert.

Click **More Options** in the Events side control and select _Optional step_ to make a step optional.

When you mark an event optional, the side control says _\*Optional_ and has a dotted line around it.

The chart then shows two funnels: one with the step and one without the step. The conversion takeaways and breakdown table also reflect these two scenarios.

Marking a step as optional has some limitations:

- It's available for Conversion and Conversion Over Time only.
- Only one step can be optional at a time.
- Only middle steps can be optional. First and last steps can never be optional.
- You can't reorder optional events.
- Events with a group-by can't be optional.
- Events that compare multiple events can't be optional.

You can also create in-line custom events in Funnel and Event Segmentation charts. For more information, refer to [Inline events](/docs/analytics/charts/event-segmentation/event-segmentation-in-line-events).