diff --git a/gui/help/images/severities-error.png b/gui/help/images/severities-error.png
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diff --git a/gui/help/images/severities-information.png b/gui/help/images/severities-information.png
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diff --git a/gui/help/images/severities-performance.png b/gui/help/images/severities-performance.png
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diff --git a/gui/help/images/severities-portability.png b/gui/help/images/severities-portability.png
new file mode 100644
index 000000000..2bc00aa10
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diff --git a/gui/help/images/severities-style.png b/gui/help/images/severities-style.png
new file mode 100644
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diff --git a/gui/help/images/severities-warning.png b/gui/help/images/severities-warning.png
new file mode 100644
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diff --git a/gui/help/online-help.qhp b/gui/help/online-help.qhp
index 61171d7e2..5444ab02e 100644
--- a/gui/help/online-help.qhp
+++ b/gui/help/online-help.qhp
@@ -8,14 +8,20 @@
                 <section title="Investigating warnings" ref="./investigating-warnings.html"/>
                 <section title="Preferences" ref="./preferences.html"/>
                 <section title="Project file dialog" ref="./projectfiledialog.html"/>
+                <section title="Severities" ref="./severities.html"/>
                 <section title="Standalone analysis" ref="./standalone-analysis.html"/>
                 <section title="Tagging" ref="./tagging.html"/>
                 <section title="Quick walk through" ref="./walkthrough.html"/>
             </section>
         </toc>
         <keywords>
+            <keyword name="Error" ref="./severities.html"/>
+            <keyword name="Performance" ref="./severities.html"/>
+            <keyword name="Portability" ref="./severities.html"/>
             <keyword name="Project" ref="./projectfiledialog.html"/>
+            <keyword name="Style" ref="./severities.html"/>
             <keyword name="Tag" ref="./tagging.html"/>
+            <keyword name="Warning" ref="./severities.html"/>
         </keywords>
         <files>
           <file>index.html</file>
@@ -23,6 +29,13 @@
           <file>investigating-warnings.html</file>
           <file>preferences.html</file>
           <file>projectfiledialog.html</file>
+          <file>severities.html</file>
+          <file>images/severities-error.png</file>
+          <file>images/severities-warning.png</file>
+          <file>images/severities-style.png</file>
+          <file>images/severities-performance.png</file>
+          <file>images/severities-portability.png</file>
+          <file>images/severities-information.png</file>
           <file>standalone-analysis.html</file>
           <file>tagging.html</file>
           <file>walkthrough.html</file>
diff --git a/gui/help/severities.html b/gui/help/severities.html
new file mode 100644
index 000000000..2176ace66
--- /dev/null
+++ b/gui/help/severities.html
@@ -0,0 +1,40 @@
+<html>
+<head>
+<title>Severities</title>
+</head>
+<body>
+
+<h1>Severities</h1>
+
+<h2>error</h2>
+
+<img src="images/severities-error.png"><br>
+used when bugs are found
+
+<h2>warning</h2>
+
+<img src="images/severities-warning.png"><br>
+suggestions about defensive programming to prevent bugs
+
+<h2>style</h2>
+
+<img src="images/severities-style.png"><br>
+stylistic issues related to code cleanup (unused functions, redundant code, constness, and such)
+
+<h2>performance</h2>
+
+<img src="images/severities-performance.png"><br>
+Suggestions for making the code faster. These suggestions are only based on common knowledge. It is not certain you'll get any measurable difference in speed by fixing these messages.
+
+<h2>portability</h2>
+
+<img src="images/severities-portability.png"><br>
+portability warnings. 64-bit portability. code might work different on different compilers. etc.
+
+<h2>information</h2>
+
+<img src="images/severities-information.png"><br>
+Configuration problems. The recommendation is to only enable these during configuration.
+
+</body>
+</html>
