diff --git a/documentation/adt-manual/style.css b/documentation/adt-manual/style.css
index e6c62978b3..3b098aa493 100644
--- a/documentation/adt-manual/style.css
+++ b/documentation/adt-manual/style.css
@@ -110,7 +110,7 @@ h5 {
 h6 {
   margin: 1em 0em 0em 0em;
   padding: 1em 0em 0em 0em;
-  font-size: 80%;
+  font-size: 110%;
   font-weight: bold;
 }
 
diff --git a/documentation/bsp-guide/style.css b/documentation/bsp-guide/style.css
index 28cf7c7a26..4a1a45e727 100644
--- a/documentation/bsp-guide/style.css
+++ b/documentation/bsp-guide/style.css
@@ -110,7 +110,7 @@ h5 {
 h6 {
   margin: 1em 0em 0em 0em;
   padding: 1em 0em 0em 0em;
-  font-size: 80%;
+  font-size: 110%;
   font-weight: bold;
 }
 
diff --git a/documentation/dev-manual/style.css b/documentation/dev-manual/style.css
index 67184972e1..23c8e74c1e 100644
--- a/documentation/dev-manual/style.css
+++ b/documentation/dev-manual/style.css
@@ -110,7 +110,7 @@ h5 {
 h6 {
   margin: 1em 0em 0em 0em;
   padding: 1em 0em 0em 0em;
-  font-size: 80%;
+  font-size: 110%;
   font-weight: bold;
 }
 
diff --git a/documentation/kernel-manual/style.css b/documentation/kernel-manual/style.css
index ab507a1f68..a90d4af291 100644
--- a/documentation/kernel-manual/style.css
+++ b/documentation/kernel-manual/style.css
@@ -110,7 +110,7 @@ h5 {
 h6 {
   margin: 1em 0em 0em 0em;
   padding: 1em 0em 0em 0em;
-  font-size: 80%;
+  font-size: 110%;
   font-weight: bold;
 }
 
diff --git a/documentation/poky-ref-manual/style.css b/documentation/poky-ref-manual/style.css
index 2eefe0b988..e896a39d33 100644
--- a/documentation/poky-ref-manual/style.css
+++ b/documentation/poky-ref-manual/style.css
@@ -110,7 +110,7 @@ h5 {
 h6 {
   margin: 1em 0em 0em 0em;
   padding: 1em 0em 0em 0em;
-  font-size: 80%;
+  font-size: 110%;
   font-weight: bold;
 }
 
diff --git a/documentation/yocto-project-qs/style.css b/documentation/yocto-project-qs/style.css
index 66283950c0..234e432a74 100644
--- a/documentation/yocto-project-qs/style.css
+++ b/documentation/yocto-project-qs/style.css
@@ -110,7 +110,7 @@ h5 {
 h6 {
   margin: 1em 0em 0em 0em;
   padding: 1em 0em 0em 0em;
-  font-size: 80%;
+  font-size: 110%;
   font-weight: bold;
 }