Products which have been added before integrating Xero with Heydoc will not be automatically added to your system, these need to be saved manually.
To do this click "Products" at the top. You will see a list of products as below:
Click the product you want to add to Xero. You will see this page, click the edit icon in the top right hand corner:
You will see the page below:
Click the the blue "Save" button as above and you'll see a little green banner in the top right hand corner of your page which will say "Updating of product uploaded successfully to Xero":
You will now be able to use this product in your invoices in Xero.
For details on how to set-up your Xero account with Heydoc see Integrating your Xero account with Heydoc.