Hmm, it seems I won't be able to explore this procedure, as my Epson 3880 driver (Mac, version 9.33) does not come with the 'Epson LFP Remote Panel' — the icon is there in Epson Printer Utility 4, but it is greyed-out.
Edit to add:
- I'm UK-based, but I have always used the drivers from the US Epson site. On that site, driver 9.33, released 21 Apr 2016, is the latest available for the 3880, and it does not include the 'Epson LFP Remote Panel'.
- On the Epson UK site there is a more recent driver, 10.08, released 10 Jan 2018, and a separate download link for 'Epson LFP Remote Panel 2', released 12 Sep 2018.
Hmm, my printer is working fine, so I hesitate to start uninstalling and reinstalling drivers.