To scan using an auto feeder, first make sure your scanner is properly connected to your computer and powered on. Then open the scanning software that came with your scanner or that you installed from the manufacturer's website. Load the documents you want to scan into the auto feeder tray and make sure they are correctly aligned. In the scanning software, select the option to scan using an auto feeder. Choose the appropriate settings for your scan, such as resolution and file format, and then click Scan. The scanning process will begin and the documents will be fed through the scanner one at a time. When the scan is complete, save the file and close the scanning software. You can now view or edit your scanned document as needed.