# Printronix: Change Interface

<span style="white-space: pre-wrap;">The </span>****Interface****<span style="white-space: pre-wrap;"> setting determines which interface the printer will be listening for print jobs on. It's important to have this set correctly, or your printer won't accept print jobs and may not even be detected by the Print Client.</span>

The current interface will show on the printer's Online screen:

[![image.png](https://kb.simplerfid.com/uploads/images/gallery/2026-03/scaled-1680-/dKoimage.png)](https://kb.simplerfid.com/uploads/images/gallery/2026-03/dKoimage.png)

#### Changing the Interface setting

1. First, pause your printer.
2. <span style="white-space: pre-wrap;">Open </span>****Settings****
3. <span style="white-space: pre-wrap;">Navigate to </span>****Host I/O &gt; Control****
4. <span style="white-space: pre-wrap;">Press Enter to edit the </span>****Interface****<span style="white-space: pre-wrap;"> setting</span>
    - <span style="white-space: pre-wrap;">If you see ENTER SWITCH LOCKED, follow these steps: </span>[ENTER SWITCH LOCKED](https://kb.simplerfid.com/books/printers/page/printronix-enter-switch-locked)
5. <span style="white-space: pre-wrap;">Use the up/down arrow keys to scroll to </span>****Ethernet****<span style="white-space: pre-wrap;"> or </span>****USB**** depending on how the printer is connected
6. Press Enter to select the correct setting
7. <span style="white-space: pre-wrap;">Unpause the printer, and choose </span>****Save Permanently in Active Config****.

The printer should now display the correct interface.

<p class="callout info"><span style="white-space: pre-wrap;">Follow this </span>[article](https://kb.simplerfid.com/books/printer-set-up/page/what-needs-to-be-plugged-into-a-printronix-printer)<span style="white-space: pre-wrap;"> if you are not sure what needs to be plugged into a Printronix printer.</span></p>