In Format > Page tab Page, I changed “Paper Format” > “Format:” from A4 to Letter. In File > Print, the left (preview) pane shows Letter as expected, and the printer uses Letter as expected. However, in the right pane, tab General, “Page Layout” > “Paper size:” still shows A4.
What is the lower right area of the dialog telling me? Have I found a bug?
I see this happening on debian-buster local build of commit f9050075, 2020-10-04, and in my currently latest version in bibisect-linux-64-7.1.