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# Add A4 printer to ViKING POS till

This procedure describes how to add such a printer to a [ViKING POS](/help/pos/wpu) till.

Before you begin, make sure that the required printer is installed, connected to the store's network, powered on, and loaded with paper.

1. On the keyboard that's attached to the till, press CTRL+ALT+F1

After a short wait, this will open a new virtual screen on the till's display
2\. In the login dialog, click **Not listed?**
3\. Log in with user name `root` and the required password
4\. On the new virtual screen, open the Firefox browser
5\. In the browser, open this address: `localhost:631`

This will open a CUPS web page (CUPS is a printer management tool)
6\. On the CUPS web page, under **CUPS for Administrators**, click the **Adding Printers and Classes** link
7\. Click **Add Printer**
8\. In the authentication dialog, log in with user name `root` and the required password

> **Note**
>
> The dialog that follows will offer to save the login details. Make sure that you click **Don't Save**.

9. In the list of available printers, under **Discovered Network Printers**, select the required printer, and then click **Continue**

A confirmation dialog will show details about the selected printer

Under **Connection**, verify that the network path to the printer begins with `dnssd`

If it does, click **Continue**

> **Info**
>
> If the network path to the printer instead begins with `socket`, click the browser's back button, select another printer, and verify that it's network path begins with `dnssd`

10. Click **Add Printer**, then click **Set Default Options**, and wait for a short while until a new page loads
11. In the **Administration** drop-down, select **Set as Server Default**, and wait for a short while until the previous page loads again
12. In the **Maintenance** drop-down, select **Print Test Page**

Verify that the printer prints a test page

> **Info**
>
> It can take up to 30 seconds before the printer begins to print the test page

When the test page has been printed successfully, you can close the browser
13\. To log out of the virtual screen and return to the till's normal display, click the

![Icon downtriangle](/_fern-files/_img/fbc9f52ae33798a818f890364e6d678e5fbc748ff507e8a777e5c53d2f4a1a02.webp)

in the top right corner of the virtual screen, select `root`, and then select **Log Out**

> **Info**
>
> By default, it takes 60 seconds before you get logged out of the virtual screen. Click **Log Out** again to log out immediately and return to the till's normal display