diff --git a/kcms/componentchooser/emailclientconfig_ui.ui b/kcms/componentchooser/emailclientconfig_ui.ui
--- a/kcms/componentchooser/emailclientconfig_ui.ui
+++ b/kcms/componentchooser/emailclientconfig_ui.ui
@@ -50,7 +50,7 @@
         <bool>false</bool>
        </property>
        <property name="toolTip">
-        <string>&lt;ul&gt; &lt;li&gt;%t: Recipient's address&lt;/li&gt; &lt;li&gt;%s: Subject&lt;/li&gt; &lt;li&gt;%c: Carbon Copy (CC)&lt;/li&gt; &lt;li&gt;%b: Blind Carbon Copy (BCC)&lt;/li&gt; &lt;li&gt;%B: Template body text&lt;/li&gt; &lt;li&gt;%A: Attachment &lt;/li&gt; &lt;li&gt;%u: Full mailto: URL &lt;/li&gt;&lt;/ul&gt;</string>
+        <string>Optional placeholders: &lt;ul&gt; &lt;li&gt;%t: Recipient's address&lt;/li&gt; &lt;li&gt;%s: Subject&lt;/li&gt; &lt;li&gt;%c: Carbon Copy (CC)&lt;/li&gt; &lt;li&gt;%b: Blind Carbon Copy (BCC)&lt;/li&gt; &lt;li&gt;%B: Template body text&lt;/li&gt; &lt;li&gt;%A: Attachment &lt;/li&gt; &lt;li&gt;%u: Full mailto: URL &lt;/li&gt;&lt;/ul&gt;</string>
        </property>
        <property name="whatsThis">
         <string>Press this button to select your favorite email client. Please note that the file you select has to have the executable attribute set in order to be accepted.&lt;br/&gt; You can also use several placeholders which will be replaced with the actual values when the email client is called:&lt;ul&gt; &lt;li&gt;%t: Recipient's address&lt;/li&gt; &lt;li&gt;%s: Subject&lt;/li&gt; &lt;li&gt;%c: Carbon Copy (CC)&lt;/li&gt; &lt;li&gt;%b: Blind Carbon Copy (BCC)&lt;/li&gt; &lt;li&gt;%B: Template body text&lt;/li&gt; &lt;li&gt;%A: Attachment &lt;/li&gt; &lt;/ul&gt;</string>