Go to Settings > Lead Distribution > Lead Conversion Field Mapping to determine how your Lead custom fields are mapped to custom fields on the Deal, Account and Contact records in Channeltivity. This allows your data to carry over to the Deal when the Lead is converted 

To add a field mapping, click the “Add Mapping” button and select a field from the Lead dropdown menu. You’ll then click the Deal dropdown menu to select the corresponding field on the Deal. 

Lead Conversion Field Mapping Screen

 If the field does not yet exist on the Deal, you can create it by clicking the “Create New Field” button.

Lead Conversion Field Mappings - Create New Field