# Review a column mapping and its output

Use the real mapping controls, inspect the separate CSV and retain the mapping recipe.

Source: https://help.smartfact.ai/feedbench/guides/mapping-preview

Audience: Operator

Use made-up files for practice. FeedBench checks on this device only. No file is uploaded or sent into a live product.

## Review a column mapping and its output

1. **Open the prepared mapping**

   Open the prepared mapping.

   Try the made-up CardBench mapping. Read how each source column fills a new column before creating a preview.

2. **Create and review the mapped preview**

   Create and review the mapped preview.

   Create a separate file in the chosen layout. Review the output carefully. These receiving rules are draft checks and do not prove that a live import will succeed.

3. **Download the reviewed CSV preview**

   Download the reviewed CSV preview.

   Read the warning and accept only if you want the development preview. The source bytes stay unchanged. The receiving copies field is emitted as a whole number.

4. **Download the mapping choices**

   Download the mapping choices.

   Save the mapping recipe for reuse. Reusing a recipe does not remove the need to check the next file.

5. **Download a report without private rows**

   Download a report without private rows.

   The default PDF contains counts and problem locations. It leaves out your values unless you explicitly add records.

6. **Save the work on this device**

   Save the work on this device.

   Save on a device you control. Local work is not a cloud backup or an approved production import.

7. **Download a portable backup**

   Download a portable backup.

   Keep a backup if you need to reopen this work elsewhere. It contains your files and settings, so store it securely.

[Watch or practise this chapter](https://help.smartfact.ai/feedbench/demo?guide=mapping-preview&chapter=mapping-preview&audience=office)