Go to the Retrieve or Preview section and click a source record. This opens a detail view where you can see:

• Source: all field values from the retrieved record.

• Transformed: both the current values (if any) and the transformed values for mapped target fields.

If the record doesn't meet execution criteria, you'll see "No target action will be taken for this source record". If multiple target matches exist, DSP shows them as tabs—click any tab to view its transformations.

Note: To enable this preview, ensure Open Links in Record Page is unchecked in Query Builder.