diff --git a/Docs/src/sections.but b/Docs/src/sections.but
index 021f4e6f..984dcd86 100644
--- a/Docs/src/sections.but
+++ b/Docs/src/sections.but
@@ -22,9 +22,9 @@ Tells the installer that the current section needs an additional "size_kb" kilob
 
 \S2{ssection} Section
 
-\c [/o] [([!]|[-])section_name] [section index output]
+\c [/o] [([!]|[-])section_name] [section_index_output]
 
-Begins and opens a new section. If section_name is empty, omitted, or begins with a -, then it is a hidden section and the user will not have the option of disabling it. If the section name is 'Uninstall' or is prefixed with 'un.', then it is a an uninstaller section. If section index output is specified, the parameter will be !defined with the section index (that can be used for \R{sectionsettext}{SectionSetText} etc). If the section name begins with a !, the section will be displayed as bold. If the /o switch is specified, the section will be unselected by default.
+Begins and opens a new section. If section_name is empty, omitted, or begins with a -, then it is a hidden section and the user will not have the option of disabling it. If the section name is 'Uninstall' or is prefixed with 'un.', then it is a an uninstaller section. If \e{section_index_output} is specified, the parameter will be !defined with the section index (that can be used for \R{sectionsettext}{SectionSetText} etc). If the section name begins with a !, the section will be displayed as bold. If the /o switch is specified, the section will be unselected by default.
 
 \c Section "-hidden section"
 \c SectionEnd
@@ -64,9 +64,9 @@ This command specifies which install types (see \R{ainsttype}{InstType}) the cur
 
 \S2{ssectiongroup} SectionGroup
 
-\c [/e] Caption [section_group_name index output]
+\c [/e] Caption [section_group_name index_output]
 
-This command inserts a section group. The section group must be closed with \R{ssectiongroupend}{SectionGroupEnd}, and should contain 1 or more sections. If the section group name begins with a !, its name will be displayed with a bold font. If /e is present, the section group will be expanded by default. If section index output is specified, the parameter will be !defined with the section index (that can be used for \R{sectionsettext}{SectionSetText} etc). If the name is prefixed with 'un.' the section group is an uninstaller section group.
+This command inserts a section group. The section group must be closed with \R{ssectiongroupend}{SectionGroupEnd}, and should contain 1 or more sections. If the section group name begins with a !, its name will be displayed with a bold font. If /e is present, the section group will be expanded by default. If \e{index_output} is specified, the parameter will be !defined with the section index (that can be used for \R{sectionsettext}{SectionSetText} etc). If the name is prefixed with 'un.' the section group is an uninstaller section group.
 
 \c SectionGroup "some stuff"
 \c Section "a section"