Lyx: change screen fonts for "section" and "part" environments

Question

Default screen fonts for Part and Section are the same, which makes them confusing to use. Is there a way to change them?

Answer 1

In the layouts folder in LyX' application directory, you will find a file called article.layout, which defines how document elements should appear in LyX. Most are inherited from stdclass.inc, but the layout for Part and Part* are defined there, as follows:

Style Part
    Align                 Left
    AlignPossible         Left
    TopSep                2
    BottomSep             1.5
    Font
      Size                Larger
    EndFont
End


Style Part*
    Align                 Left
    AlignPossible         Left
    TopSep                2
    BottomSep             1.5
    Font
      Size                Larger
    EndFont
End

These types of definitions can be added to the Local layout in the Document settings. There is also a button there to save whatever you add as Document defaults. Other valid values for the Size parameter is Largest and Huge. I do not know all the possible things one can put here, but for example changing the Font part in the above to

Font
  Size              Huge
  Color             blue
EndFont

and adding it to Document --> Settings --> Local layout will set parts in a larger font, and blue colour.