I have been looking forward to being able to create Personal Books which will display in the font chosen under Program Settings (I currently use Cambria). I have not been disappointed!
However, a little experimenting seems to show that (within the source .docx file) any text set to display in Times New Roman will display (in Logos 4) correctly in the font chosen under Program Settings, whatever that font is. But if another font is used for all, or part of the text in the .docx file, then this text will not update to the font chosen under Program Settings but will be displayed as is. An example of this can be seen in the video featured on the blog this morning where two distinct fonts are visible.
Clearly there could be advantages to being able to set the font for some text so that it never changes, however, if you want it to change according to your Program Settings then it seems that it must be in Times New Roman (in the .docx file).
I have not seen any reference to this anywhere on the wiki page nor in what currently passes for a help file so thought it might be of some use. I certainly appreciate all the help I derive from those who contribute regularly to the forums.