Mark Seagal (hope that's spelled right) pointed me to creating custom sizes with 0" margins, which has really helped me. For example, I have a custom 17x22" size that eliminates the default margins that sometimes creep in with non-custom settings. The only issue I have had, which has been discussed in another post of mine, is that some Rolls have a "hard" margin setting of 1/8" along the edges and cannot print completely borderless from a roll; but as others have pointed out, and which I eventually realized, the darn frame rabbet covers this white margin.
My printer also frequently defaults back to "Roll Paper" even when I just printed a sheet using Front Feed and used saved custom settings. I have become used to always going into Printer Settings to correct it. Seems to be a software glitch with Epson. It reverts back no matter how many times I save the darned settings.
So, I guess my point is to use the Custom Sizes with 0 margins all-around if you have not already set those? I have them setup for the regular sheet sizes I use....and the rolls.
Regards,
Ron