Version: 6.4.4.2 (x64) Build ID: 3d775be2011f3886db32dfd395a6a6d1ca2630ff CPU threads: 4; OS: Windows 10.0 Build 19041; UI render: default; VCL: win; Locale: en-GB (en_GB); UI-Language: en-GB Calc: threaded My Windows 10 laptop resolution is 1366 x 768 px (obtained from the Intel graphics control panel). As the width of the display is 13.5 cms, this gives a DPI = 101. Using "Screen Ruler" (https://sourceforge.net/projects/screenruler/) at this setting, I find that the dimensions of objects in the Writer edit window are actually 5% less than they should be at 100% zoom. Thus, at 100% zoom, a page width settings of 13 cms (Page style > Page) becomes approx 12.5 cms in the edit window, and so on.
Mistake> see Bug 135497 instead.