Thanks Fetish, the dialog I noticed with what presumably holds the setting to center an image is in the Epson Print driver. When I press Page Setup in LR, and then: "Printer Properties": the Epson Driver opens. On the left is a box that displays a box labeled "Current Settings" (there is a toggle at the bottom of it that says "always show current settings"). The top of this box is labeled "Main". It shows a bunch of settings starting with "Media Type". The last setting in the Main heading is: "Centered". It is set to "OFF". Which means (to me) that it can be set to ON. I cannot for the life of me figure out how to toggle it on??
( Just looked at the screen capture that I posted. I don't print photo's with those settings. )