This article shows how you set a lead-in for an upsell. Follow the steps below:
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​1. Go into the booking engine.

2. On the left side panel click on upsells, then click upsell group list.

3. Edit the package you want to apply a lead-in to, by selecting the edit button to the right of the upsell.
​​4. Click on the Advanced tab and set your Min and Max lead-in days.

5. Click Save Changes.