diff -r 174c30103b57 Lib/idlelib/FormatParagraph.py
--- a/Lib/idlelib/FormatParagraph.py	Sat Jun 14 09:27:10 2014 +0100
+++ b/Lib/idlelib/FormatParagraph.py	Sat Jun 14 20:25:51 2014 +0300
@@ -44,9 +44,11 @@
 
         The length limit parameter is for testing with a known value.
         """
-        if limit == None:
+        if limit is None:
+            # The default length limit is that defined by pep8
             limit = idleConf.GetOption(
-                    'main', 'FormatParagraph', 'paragraph', type='int')
+                'extensions', 'FormatParagraph', 'max-width',
+                type='int', default=72)
         text = self.editwin.text
         first, last = self.editwin.get_selection_indices()
         if first and last:
diff -r 174c30103b57 Lib/idlelib/config-extensions.def
--- a/Lib/idlelib/config-extensions.def	Sat Jun 14 09:27:10 2014 +0100
+++ b/Lib/idlelib/config-extensions.def	Sat Jun 14 20:25:51 2014 +0300
@@ -31,6 +31,7 @@
 
 [FormatParagraph]
 enable=1
+max-width=72
 [FormatParagraph_cfgBindings]
 format-paragraph=<Alt-Key-q>
 
diff -r 174c30103b57 Lib/idlelib/config-main.def
--- a/Lib/idlelib/config-main.def	Sat Jun 14 09:27:10 2014 +0100
+++ b/Lib/idlelib/config-main.def	Sat Jun 14 20:25:51 2014 +0300
@@ -58,9 +58,6 @@
 font-bold= 0
 encoding= none
 
-[FormatParagraph]
-paragraph=72
-
 [Indent]
 use-spaces= 1
 num-spaces= 4
diff -r 174c30103b57 Lib/idlelib/configDialog.py
--- a/Lib/idlelib/configDialog.py	Sat Jun 14 09:27:10 2014 +0100
+++ b/Lib/idlelib/configDialog.py	Sat Jun 14 20:25:51 2014 +0300
@@ -337,7 +337,6 @@
         #tkVars
         self.winWidth=StringVar(self)
         self.winHeight=StringVar(self)
-        self.paraWidth=StringVar(self)
         self.startupEdit=IntVar(self)
         self.autoSave=IntVar(self)
         self.encoding=StringVar(self)
@@ -352,7 +351,6 @@
         frameSave=LabelFrame(frame,borderwidth=2,relief=GROOVE,
                              text=' Autosave Preferences ')
         frameWinSize=Frame(frame,borderwidth=2,relief=GROOVE)
-        frameParaSize=Frame(frame,borderwidth=2,relief=GROOVE)
         frameHelp=LabelFrame(frame,borderwidth=2,relief=GROOVE,
                              text=' Additional Help Sources ')
         #frameRun
@@ -376,11 +374,6 @@
         labelWinHeightTitle=Label(frameWinSize,text='Height')
         entryWinHeight=Entry(frameWinSize,textvariable=self.winHeight,
                 width=3)
-        #paragraphFormatWidth
-        labelParaWidthTitle=Label(frameParaSize,text='Paragraph reformat'+
-                ' width (in characters)')
-        entryParaWidth=Entry(frameParaSize,textvariable=self.paraWidth,
-                width=3)
         #frameHelp
         frameHelpList=Frame(frameHelp)
         frameHelpListButtons=Frame(frameHelpList)
@@ -401,7 +394,6 @@
         frameRun.pack(side=TOP,padx=5,pady=5,fill=X)
         frameSave.pack(side=TOP,padx=5,pady=5,fill=X)
         frameWinSize.pack(side=TOP,padx=5,pady=5,fill=X)
-        frameParaSize.pack(side=TOP,padx=5,pady=5,fill=X)
         frameHelp.pack(side=TOP,padx=5,pady=5,expand=TRUE,fill=BOTH)
         #frameRun
         labelRunChoiceTitle.pack(side=LEFT,anchor=W,padx=5,pady=5)
@@ -417,9 +409,6 @@
         labelWinHeightTitle.pack(side=RIGHT,anchor=E,pady=5)
         entryWinWidth.pack(side=RIGHT,anchor=E,padx=10,pady=5)
         labelWinWidthTitle.pack(side=RIGHT,anchor=E,pady=5)
-        #paragraphFormatWidth
-        labelParaWidthTitle.pack(side=LEFT,anchor=W,padx=5,pady=5)
-        entryParaWidth.pack(side=RIGHT,anchor=E,padx=10,pady=5)
         #frameHelp
         frameHelpListButtons.pack(side=RIGHT,padx=5,pady=5,fill=Y)
         frameHelpList.pack(side=TOP,padx=5,pady=5,expand=TRUE,fill=BOTH)
@@ -446,7 +435,6 @@
         self.keysAreBuiltin.trace_variable('w',self.VarChanged_keysAreBuiltin)
         self.winWidth.trace_variable('w',self.VarChanged_winWidth)
         self.winHeight.trace_variable('w',self.VarChanged_winHeight)
-        self.paraWidth.trace_variable('w',self.VarChanged_paraWidth)
         self.startupEdit.trace_variable('w',self.VarChanged_startupEdit)
         self.autoSave.trace_variable('w',self.VarChanged_autoSave)
         self.encoding.trace_variable('w',self.VarChanged_encoding)
@@ -531,10 +519,6 @@
         value=self.winHeight.get()
         self.AddChangedItem('main','EditorWindow','height',value)
 
-    def VarChanged_paraWidth(self,*params):
-        value=self.paraWidth.get()
-        self.AddChangedItem('main','FormatParagraph','paragraph',value)
-
     def VarChanged_startupEdit(self,*params):
         value=self.startupEdit.get()
         self.AddChangedItem('main','General','editor-on-startup',value)
@@ -1032,9 +1016,6 @@
                                              type='int'))
         self.winHeight.set(idleConf.GetOption('main','EditorWindow','height',
                                               type='int'))
-        #initial paragraph reformat size
-        self.paraWidth.set(idleConf.GetOption('main','FormatParagraph','paragraph',
-                                              type='int'))
         # default source encoding
         self.encoding.set(idleConf.GetOption('main', 'EditorWindow',
                                              'encoding', default='none'))