Doc: function tooltips

Change-Id: Ieca6fec27f81c5738c837963ff21a6cb3f707204
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

doc/src/howto/creator-help.qdoc

@@ -40,8 +40,13 @@
 
         \o  To view documentation, switch to \gui Help mode.
 
-        \o  To obtain context sensitive help, move the text cursor to a Qt class
-            or function and press \key F1. The documentation is displayed in a
+        \o  To view context sensitive help on a Qt class or function as a
+            tooltip, move the mouse cursor over the class or function. If help
+            is not available, the tooltip displays type information for the
+            symbol.
+
+        \o  To display the full help on a Qt class or function, press \key F1.
+            The documentation is displayed in a
             pane next to the code editor, or, if there is not enough vertical
             space, in the fullscreen \gui Help mode.
 
@@ -59,6 +64,15 @@
 
     \image qtcreator-context-sensitive-help.png
 
+    \section1 Viewing Function Tooltips
+
+    To hide function tooltips by default, select \gui {Tools > Options >
+    Text Editor > Show help tooltips > On Shift+Mouseover}. You can still view
+    the tooltips by pressing and holding down the \key Shift key.
+
+    To use a keyboard shortcut for viewing help tooltips, select
+    \gui {Using keyboard shortcut (Alt)}.
+
     \section1 Finding Information in Qt Documentation
 
     \QC, \QSDK and other Qt deliverables contain documentation