I notice that this figure was added to BG6200. I have a few questions. Why use a dialog in Calc as an example? Why not use an example in Base? Was this a dialog that come with LibreOffice, or might it be a window's variation? I can not find it in the Debian version at all. (I looked for it in Calc.) This using LibreOffice versions 126.96.36.199 and 188.8.131.52.
Earlier today, I signed out this file and updated the Guide Status. I left an other comment that will need to be addressed. Other than that, the Preface is ready to be returned if the problem in the first paragraph can be resolved.