Click on barcode icon from drawing tools to add barcode on your label, double click on barcode to set its properties:
Linear Barcode: On selecting any Linear Barcode font standard, Properties window includes following tabs: Value, Size, Font and Color.
2D Barcode: On selecting any 2D Barcode font standard, Properties window tab will change according to Font properties.
Here for demonstration purpose, we are using UCC/EAN -128 linear font. Set its value, color, font and size accordingly.