# Interface
System Settings > Interface

Use this tab to specify the interface settings.

## Interface

### Fixed USB Port

Specify whether or not to fix the USB port.
If you previously installed the printer driver and then connect your computer to a different machine of the same model via USB, you need to reinstall the machine's printer driver because different machines of the same model have different USB serial numbers. This function sets each machine's USB serial number to the same value, so you can print using different machines of the same model without reinstalling the driver.

### Locked Print Timeout (seconds)

Specify how many seconds the machine holds a new locked print file when the machine cannot store any more locked print files. Enter a value between 0 and 1800 (seconds).
You can print or delete the new locked print file within the specified time. You can also print or delete an existing locked print file so that the new locked print file can be stored in the machine.

## Buttons

### Refresh

Click to update the currently displayed information.

Note

- Before making the settings, click Refresh to obtain the machine's current status.

### Please enter Administrator Password.

Enter the administrator password.

Note

- If you enter a wrong password or leave the text box blank, the settings on this tab will not be applied when you click OK.

### OK

Click to apply the settings.

### Cancel

Click to cancel the settings.

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