您可以在“布局”（Layout）页面更改“基础字体大小”（Base Font Size），但它只接受精确到十分之一磅（point）的数值。有时候，只需稍微调整一下，就能显著改善整本书的整体排版效果，尤其是对于篇幅较长的书卷。
我认为这个“基础字体大小”只是被转换为对应的 \FontSizeUnit，其中 1.000pt 对应 12 pt。因此，如果您想要更精确的字体大小，可以将以下行添加到您的 ptxprint-mods.tex 文件中（前两行是注释）：
% For more precise font size, divide into 12
% E.g. 10.85 / 12 -> 0.904pt
\FontSizeUnit=0.904pt
然后进行计算，以获取您想要的任意精度的字体大小。这将覆盖从“布局”页面定义的 \FontSizeUnit 值。
You can change the Base Font Size on the Layout page, but it only accepts down to the tenth of a point. Sometimes just tweaking it a little bit one way or another makes a significant improvement in the overall layout of a book, especially for longer books.
I believe that this Base Font Size is just converted to the corresponding \FontSizeUnit, where 1.000pt corresponds to 12 pt. So if you want more precise font size, you can add these lines to your ptxprint-mods.tex file (the first two of which are comments):
% For more precise font size, divide into 12
% E.g. 10.85 / 12 -> 0.904pt
\FontSizeUnit=0.904pt
Then do the calculation to get whatever precision font size you want. This will just override whatever \FontSizeUnit gets defined from the Layout page.
机器翻译自 English
