# Picklist mapping
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The picklist dialog box allows limited and extended mappings between the partner’s picklist field and APN. The **ACE Mappings** page also has an Auto Map function if using the provided **custom ACE opportunity object **. For more information about the object, refer to [Using a standard Salesforce object or custom object](crm-connector-mapping.md#custom-ace-opportunity-object) later in this guide.

If an exact match is found between the partner’s field values and APN, those values are mapped automatically. The option for extended mapping lets partners map a single APN value to multiple sources, configure additional target mappings, and set default mappings.

## Limited mapping
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1. On the **ACE Mappings** page, select a source field, and then choose **Map Values**. 

   The mapping dialog box appears.

1. For **Step 1: Primary APN Values**, choose either **Auto Map** or the Salesforce value for the corresponding ACE pipeline manager, and then choose **Save**.

1. Repeat steps 1 and 2 as necessary to map all of your ACE pipeline manager values.

1. To close the mapping dialog box, choose **Close**. 

Partners receive a confirmation message that the value mappings were saved. 

## Extended mapping
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1. If the same source value maps to multiple APN values, proceed with the mapping as previously described.

1. On the **Primary APN Values** tab, choose the same value mapping for multiple APN values. 

1. If unmapped values exist in the partner’s organization, the **Additional APN Value** tab lets you map additional values to APN. This helps partners ensure that all applicable values in their organization are mapped to appropriate APN values. 

1. If a single value in the partner’s organization is mapped to more than one APN value, use the **Secondary APN Values** tab to set the default value for outbound integrations.