To open in Elements select Automation Tools > Epson Print Layout; not the Print command.
In Print in Elements there is the option of Borderless printing. If selected there is the option to a adjust the amount of expansion; min, mid or max.
However in EPL you adjust the image size. I turn on Rear Feed-Borderless, I load my photo papers there, check Expansion, do not check Scale to fit, select Centre then size image to 212mm x 301mm I.e. 2mm in each dimension.
I am still experimenting so time will tell if I carry on using this app. or return to Print.