Page Comparison

...

1. Edit your invoice template in Settings → Billing → Invoice Customization → Invoice template 
2. Click on HTML button to edit html source of your template

3. To <table> element holding your invoice items, add id ID attribute:

   Code Block
   language xml
   <table id="invoice-table-items">

    

   
   

4. At the bottom of your template, add <style> block with css rules providing alternating backgrounds, like so:
    

   Code Block
   language xml
   <style> #invoice-table-items tr:nth-child(odd) { background: #c0c0c0; } #invoice-table-items tr:nth-child(even) { background: #ffffff; } </style>