This Retrieval Limits section of the Universal Capture dialog box allows you to specify when Quick Fields should stop retrieving files and how many files should be queued up at one time to be processed.
Example: If you have a scheduled Universal Capture session that is supposed to OCR documents, you can configure Quick Fields to limit the number of files copied to the processing queue to 100. Quick Fields will continuously OCR documents while files are being copied to the queue. Once the queue hits 100, the process of copying files will be temporarily paused until the number of documents in the queue decreases.