The steps involved in customizing and printing invoice are
* Select customer -> create invoice.
* Enter customer name, date and address.
* Select product or add new product and enter its rate and quantity.
* Select tax details and deduction rate.
* Enter the due date and click send mail if a mail has to be sent.
* Click on the save and print button.
* It will ask whether you want to customize the invoice or not.
* Click OK to customize the invoice.
* A popup window appears.In that you have the option to upload your company logo to appear in the invoice.
* Choose the fields you want to appear it in invoice and type customer message if any.
* Click submit button.
Now you can see the invoice as you wished. Click Print to print the invoice.