Slot barcodes can be generated using Export PDF Barcodes. You can also choose different barcode formats, based on your preferences.
1. Click Export PDF Barcodes. 
2. Choose your desired barcode type.
The barcode type will depend on your printer and paper. For 3×1 Thermal barcodes, ideally, you should use high-quality paper and a compatible printer for optimal performance.
3. Save the generated PDF file to the preferred location.
4. Open and print the PDF barcode file.
