This file is indexed.

/usr/share/lyx/layouts/foils.layout is in lyx-common 2.2.2-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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#% Do not delete the line below; configure depends on this
#  \DeclareLaTeXClass{FoilTeX}
#  \DeclareCategory{Presentations}
# Foils textclass definition file.
# Created (1.Oct.96):   Alejandro Aguilar Sierra
# Enhanced (fonts & centering):  Jean-Marc Lasgouttes
# To do: Define class specific options.


Format 60
Columns                 1
Sides                   1


DefaultFont
	Family                Sans
	Series                Medium
	Shape                 Up
	Size                  Normal
	Color                 None
EndFont


ClassOptions
	FontSize              17|20|25|30
	PageStyle             "empty|plain|foilheadings|fancy"
	Other                 "dvips"
End


Style Standard
	Category              MainText
	Margin                Static
	LatexType             Paragraph
	LatexName             dummy
	ParIndent             MM
	ParSkip               0.4
	Align                 Block
	AlignPossible         Block, Left, Right, Center
	LabelType             No_Label
End


Style Foilhead
	Category              Sectioning
	TocLevel              1
	Margin                Static
	LatexType             Command
	LatexName             foilhead
	LabelSep              xxx
	ParSkip               0.4
	TopSep                1.3
	BottomSep             0.7
	ParSep                0.7
	Align                 Center
	LabelType             No_Label
	Font
	  Series              Bold
	  Size                Large
	EndFont
End


Style ShortFoilhead
	CopyStyle             Foilhead
	LatexParam            "[-0.5in]"
End


Style Rotatefoilhead
	CopyStyle             Foilhead
	LatexName             rotatefoilhead
End


Style ShortRotatefoilhead
	CopyStyle             Rotatefoilhead
	LatexParam            "[-0.5in]"
End


# We add there a few additional lists that look good in foils.
Input stdlists.inc

Style TickList
	Category              List
	Margin                Static
	LatexType             Item_Environment
	LatexName             dinglist
	LatexParam            "{52}"
	NextNoIndent          1
	LeftMargin            MMN
	LabelSep              xx
	ItemSep               0.2
	TopSep                0.7
	BottomSep             0.7
	ParSep                0.3
	Align                 Block
	AlignPossible         Block, Left
	LabelType             Itemize
	LabelString           "_/"
	Requires	      pifont
End

Style CrossList
	Category              List
	Margin                Static
	LatexType             Item_Environment
	LatexName             dinglist
	LatexParam            "{56}"
	NextNoIndent          1
	LeftMargin            MMN
	LabelSep              xx
	ItemSep               0.2
	TopSep                0.7
	BottomSep             0.7
	ParSep                0.3
	Align                 Block
	AlignPossible         Block, Left
	LabelType             Itemize
	LabelString           "><"
	Requires	      pifont
End


Input stdtitle.inc
Input stdstruct.inc


Style Title
	Font
	  Series              Bold
	  Size                Largest
	EndFont
End


Style Author
	Font
	  Size                Large
	EndFont
End


Style Date
	Font
	  Size                Large
	EndFont
End


Style Abstract
	Font
	  Size                Normal
	  Series              Medium
	EndFont
	LabelFont
	  Size                Large
	  Series              Bold
	EndFont
End


# Header definitions:
Style My_Logo
	Category              FrontMatter
	Margin                Static
	LatexType             Command
	LatexName             MyLogo
	LeftMargin            My_Logo:xx
	LabelSep              xxx
	Align                 Left
	LabelType             Static
	LabelString           "My Logo:"
	LabelFont
	  Series              Bold
	  Shape               Italic
	  Color               red
	EndFont
End


Style Restriction
	CopyStyle             My_Logo
	LatexName             Restriction
	LeftMargin            Restriction:xx
	LabelString           "Restriction:"
End


Style Left_Header
	CopyStyle             My_Logo
	LatexName             leftheader
	LeftMargin            Left_Header:xx
	LabelString           "Left Header:"
End


Style Right_Header
	CopyStyle             My_Logo
	LatexName             rightheader
	LeftMargin            Right_Header:xx
	LabelString           "Right Header:"
End


Style Right_Footer
	CopyStyle             My_Logo
	LatexName             rightfooter
	LeftMargin            Right_Footer:xx
	LabelString           "Right Footer:"
End



Style Bibliography
	LabelFont
	  Size                Larger
	  Series              Bold
	EndFont
End


Style Theorem
	Category              Reasoning
	Margin                First_Dynamic
	LatexType             Environment
	LatexName             Theorem
	NextNoIndent          1
	LabelSep              xx
	ParSkip               0.4
	ItemSep               0.2
	TopSep                0.7
	BottomSep             0.7
	ParSep                0.3
	Align                 Block
	AlignPossible         Block, Left
	LabelType             Static
	LabelString           "Theorem #."
	TextFont
	  Shape               Slanted
	  Size                Normal
	EndFont
	LabelFont
	  Series              Bold
	EndFont
End


Style Lemma
	CopyStyle             Theorem
	LatexName             Lemma
	LabelString           "Lemma #."
End


Style Corollary
	CopyStyle             Theorem
	LatexName             Corollary
	LabelString           "Corollary #."
End


Style Proposition
	CopyStyle             Theorem
	LatexName             Proposition
	LabelString           "Proposition #."
End


Style Definition
	CopyStyle             Theorem
	LatexName             Definition
	LabelString           "Definition #."
	Font
	  Shape               Up
	EndFont
	LabelFont
	  Shape               Up
	  Series              Bold
	EndFont
End


Style Proof
	CopyStyle             Theorem
	LatexName             Proof
	LabelString           "Proof."
	Font
	  Shape               Up
	EndFont
	LabelFont
	  Shape               Up
	  Series              Bold
	EndFont
End


Style Theorem*
	CopyStyle             Theorem
	LatexName             Theorem*
	LabelString           "Theorem."
End


Style Lemma*
	CopyStyle             Lemma
	LatexName             Lemma*
	LabelString           "Lemma."
End


Style Corollary*
	CopyStyle             Corollary
	LatexName             Corollary*
	LabelString           "Corollary."
End


Style Proposition*
	CopyStyle             Proposition
	LatexName             Proposition*
	LabelString           "Proposition."
End


Style Definition*
	CopyStyle             Definition
	LatexName             Definition*
	LabelString           "Definition."
End


Input stdlayouts.inc
Input stdfloats.inc
Input stdcounters.inc
Input stdinsets.inc
Input lyxmacros.inc
Input theorems-refprefix.inc