If you want to have different background of invoice items rows in PDF/HTML invoices, you can use CSS to achieve that.
To <table> element holding your invoice items, add id attribute:
<table id="invoice-table-items"> |
At the bottom of your template, add <style> block with css rules providing alternating backgrounds, like so:
<style> #invoice-table-items tr:nth-child(odd) { background: #c0c0c0; } #invoice-table-items tr:nth-child(even) { background: #ffffff; } </style> |