diff --git a/doc/ca65.sgml b/doc/ca65.sgml
index 96c5989f2..f93eb69c4 100644
--- a/doc/ca65.sgml
+++ b/doc/ca65.sgml
@@ -3823,7 +3823,7 @@ compiler, depending on the target system selected:
 
 <sect>Structs and unions<label id="structs"><p>
 
-<sect1>Overview<p>
+<sect1>Structs and unions Overview<p>
 
 Structs and unions are special forms of <ref id="scopes" name="scopes">.  They
 are to some degree comparable to their C counterparts. Both have a list of
@@ -3918,7 +3918,7 @@ below uses examples from the C libraries. However, the feature may also be
 useful for assembler programs.
 
 
-<sect1>Overview<p>
+<sect1>Module constructors/destructors Overview<p>
 
 Using the <tt><ref id=".CONSTRUCTOR" name=".CONSTRUCTOR"></tt>, <tt><ref
 id=".DESTRUCTOR" name=".DESTRUCTOR"></tt> and <tt><ref id=".INTERRUPTOR"
diff --git a/doc/cbm510.sgml b/doc/cbm510.sgml
index 1a1f871af..6b5f40cb1 100644
--- a/doc/cbm510.sgml
+++ b/doc/cbm510.sgml
@@ -254,7 +254,7 @@ The program return code (signed char) is passed back to BASIC by use of the
 <tt/ST/ variable.
 
 
-<sect1>Interrupts<p>
+<sect1>Interrupt handlers<p>
 
 The runtime for the Commodore 510 uses routines marked as <tt/.CONDES/ type 2
 for interrupt handlers. Such routines must be written as simple machine
diff --git a/doc/cbm610.sgml b/doc/cbm610.sgml
index 8e2ac2ce9..a01cd9bc6 100644
--- a/doc/cbm610.sgml
+++ b/doc/cbm610.sgml
@@ -254,7 +254,7 @@ The program return code (low byte) is passed back to BASIC by use of the
 <tt/ST/ variable.
 
 
-<sect1>Interrupts<p>
+<sect1>Interrupt handlers<p>
 
 The runtime for the Commodore 610 uses routines marked as <tt/.CONDES/ type 2
 for interrupt handlers. Such routines must be written as simple machine
diff --git a/doc/co65.sgml b/doc/co65.sgml
index 274b5e85b..5e87545a5 100644
--- a/doc/co65.sgml
+++ b/doc/co65.sgml
@@ -274,9 +274,9 @@ it from C code. In your code, define an arbitrary variable with this name. Use
 the address of this variable as the address of the code segment of the driver.
 Be sure to never modify the variable which is in reality the start of your
 driver!
-                          
 
-<sect1>Example: Convert and link a graphics driver<p>
+
+<sect1>Example - Convert and link a graphics driver<p>
 
 As an example, here are some instructions to convert and use the c64-hi.tgi
 graphics driver: