diff --git a/TermTk/TTkCore/canvas.py b/TermTk/TTkCore/canvas.py
index 3172906a..3896eaf6 100644
--- a/TermTk/TTkCore/canvas.py
+++ b/TermTk/TTkCore/canvas.py
@@ -192,10 +192,10 @@ class TTkCanvas:
             else:
                 self._colors[y][x+i] =  colors[i].mod(x+i,y)
         # Check the full wide chars on the edge of the two canvasses
-        if self._data[y][x+a] == '':
+        if 0 <= (x+a) < self._width and self._data[y][x+a] == '':
             self._data[y][x+a]   = TTkCfg.theme.unicodeWideOverflowCh[0]
             self._colors[y][x+a] = TTkCfg.theme.unicodeWideOverflowColor
-        if TTkString._isWideCharData(self._data[y][x+b-1]):
+        if 0 <= (x+b-1) < self._width and TTkString._isWideCharData(self._data[y][x+b-1]):
             self._data[y][x+b-1]   = TTkCfg.theme.unicodeWideOverflowCh[1]
             self._colors[y][x+b-1] = TTkCfg.theme.unicodeWideOverflowColor
 
@@ -614,16 +614,16 @@ class TTkCanvas:
             self._colors[y+iy][a:b] = canvas._colors[iy][xoffset:wslice]
 
             # Check the full wide chars on the edge of the two canvasses
-            if self._data[y+iy][a]=='':
+            if 0 <= a < self._width and self._data[y+iy][a]=='':
                 self._data[y+iy][a]   = TTkCfg.theme.unicodeWideOverflowCh[0]
                 self._colors[y+iy][a] = TTkCfg.theme.unicodeWideOverflowColor
-            if TTkString._isWideCharData(self._data[y+iy][b-1]):
+            if 0 < b <= self._width and TTkString._isWideCharData(self._data[y+iy][b-1]):
                 self._data[y+iy][b-1]   = TTkCfg.theme.unicodeWideOverflowCh[1]
                 self._colors[y+iy][b-1] = TTkCfg.theme.unicodeWideOverflowColor
-            if TTkString._isWideCharData(self._data[y+iy][a-1]):
+            if 0 < a <= self._width and TTkString._isWideCharData(self._data[y+iy][a-1]):
                 self._data[y+iy][a-1]   = TTkCfg.theme.unicodeWideOverflowCh[1]
                 self._colors[y+iy][a-1] = TTkCfg.theme.unicodeWideOverflowColor
-            if ( b<self._width-1 and self._data[y+iy][b]=='' ):
+            if 0 <= b < self._width and self._data[y+iy][b]=='':
                 self._data[y+iy][b]   = TTkCfg.theme.unicodeWideOverflowCh[0]
                 self._colors[y+iy][b] = TTkCfg.theme.unicodeWideOverflowColor
 
diff --git a/TermTk/TTkCore/constant.py b/TermTk/TTkCore/constant.py
index 9581607b..f9a1c108 100644
--- a/TermTk/TTkCore/constant.py
+++ b/TermTk/TTkCore/constant.py
@@ -289,14 +289,16 @@ class TTkConstant:
         # ''' Gives the window a title bar.'''
         # WindowSystemMenuHint        = 0x00002000
         # ''' Adds a window system menu, and possibly a close button (for example on Mac). If you need to hide or show a close button, it is more portable to use WindowCloseButtonHint.'''
-        # WindowMinimizeButtonHint    = 0x00004000
-        # ''' Adds a minimize button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.'''
-        # WindowMaximizeButtonHint    = 0x00008000
-        # ''' Adds a maximize button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.'''
-        # WindowMinMaxButtonsHint     = WindowMinimizeButtonHint
-        # ''' | WindowMaximizeButtonHint	Adds a minimize and a maximize button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.'''
+        WindowReduceButtonHint      = 0x00000200
+        ''' Adds a reduce button.'''
+        WindowMinimizeButtonHint    = 0x00004000
+        ''' Adds a minimize button.'''
+        WindowMaximizeButtonHint    = 0x00008000
+        ''' Adds a maximize button.'''
+        WindowMinMaxButtonsHint     = WindowMinimizeButtonHint | WindowMaximizeButtonHint
+        ''' Adds a minimize and a maximize button.'''
         WindowCloseButtonHint       = 0x08000000
-        ''' Adds a close button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.'''
+        ''' Adds a close button.'''
         # WindowFullscreenButtonHint  = 0x80000000
         # ''' On macOS adds a fullscreen button.'''
         # WindowShadeButtonHint       = 0x00020000
diff --git a/TermTk/TTkCore/helper.py b/TermTk/TTkCore/helper.py
index 6bb9b346..039f4c1e 100644
--- a/TermTk/TTkCore/helper.py
+++ b/TermTk/TTkCore/helper.py
@@ -62,7 +62,7 @@ class TTkHelper:
     def execShortcut(letter, widget=None):
         if not isinstance(letter, str): return
         for sc in TTkHelper._shortcut:
-            if sc._letter == letter.lower() and sc._widget.isVisible():
+            if sc._letter == letter.lower() and sc._widget.isVisibleAndParent():
                 if not widget or TTkHelper.isParent(widget, sc._widget):
                     sc._widget.shortcutEvent()
                     return
@@ -76,7 +76,7 @@ class TTkHelper:
 
     @staticmethod
     def addUpdateWidget(widget):
-        if not widget.isVisible(): return
+        if not widget.isVisibleAndParent(): return
         if widget not in TTkHelper._updateWidget:
             TTkHelper._updateWidget.append(widget)
 
@@ -249,7 +249,7 @@ class TTkHelper:
 
         # TTkLog.debug(f"{len(TTkHelper._updateBuffer)} {len(TTkHelper._updateWidget)}")
         for widget in TTkHelper._updateWidget:
-            if not widget.isVisible(): continue
+            if not widget.isVisibleAndParent(): continue
             parent = widget.parentWidget()
             while parent is not None:
                 if parent not in updateBuffers:
@@ -263,7 +263,7 @@ class TTkHelper:
 
         # Paint all the canvas
         for widget in updateBuffers:
-            if not widget.isVisible(): continue
+            if not widget.isVisibleAndParent(): continue
             # Resize the canvas just before the paintEvent
             # to avoid too many allocations
             widget.getCanvas().updateSize()
@@ -277,7 +277,7 @@ class TTkHelper:
         sortedUpdateWidget = sorted(sortedUpdateWidget, key=lambda w: -w[1])
         for w in sortedUpdateWidget:
             widget = w[0]
-            if not widget.isVisible(): continue
+            if not widget.isVisibleAndParent(): continue
             pushToTerminal = True
             widget.paintChildCanvas()
 
diff --git a/TermTk/TTkWidgets/TTkPickers/colorpicker.py b/TermTk/TTkWidgets/TTkPickers/colorpicker.py
index ad43daba..1d9c1f30 100644
--- a/TermTk/TTkWidgets/TTkPickers/colorpicker.py
+++ b/TermTk/TTkWidgets/TTkPickers/colorpicker.py
@@ -244,7 +244,7 @@ class TTkColorDialogPicker(TTkWindow,TColor):
         self.colorSelected = pyTTkSignal(TTkColor)
         TTkWindow.__init__(self, *args, **kwargs)
         TColor.__init__(self, *args, **kwargs)
-        self._name = kwargs.get('name' , 'TTkColorPicker' )
+        self.setWindowFlag(TTkK.WindowFlag.WindowMaximizeButtonHint | TTkK.WindowFlag.WindowCloseButtonHint)
         self.setLayout(TTkGridLayout())
 
         colorLayout = TTkGridLayout() # Right
diff --git a/TermTk/TTkWidgets/TTkPickers/filepicker.py b/TermTk/TTkWidgets/TTkPickers/filepicker.py
index 943f30e7..b830785a 100644
--- a/TermTk/TTkWidgets/TTkPickers/filepicker.py
+++ b/TermTk/TTkWidgets/TTkPickers/filepicker.py
@@ -72,8 +72,8 @@ class TTkFileDialogPicker(TTkWindow):
         self.filesPicked = pyTTkSignal(list)
         self.folderPicked = pyTTkSignal(str)
 
-        TTkWindow.__init__(self, *args, **kwargs)
-        self._name = kwargs.get('name' , 'TTkFileDialogPicker' )
+        super().__init__(*args, **kwargs)
+        self.setWindowFlag(TTkK.WindowFlag.WindowMaximizeButtonHint | TTkK.WindowFlag.WindowCloseButtonHint)
 
         self._recentPathId = -1
         self._recentPath = []
diff --git a/TermTk/TTkWidgets/widget.py b/TermTk/TTkWidgets/widget.py
index 0ad41fa4..32813d71 100644
--- a/TermTk/TTkWidgets/widget.py
+++ b/TermTk/TTkWidgets/widget.py
@@ -520,29 +520,12 @@ class TTkWidget(TMouseEvents,TKeyEvents, TDragEvents):
         self._minw = minw
         self.update(updateLayout=True, updateParent=True)
 
-    @staticmethod
-    def _propagateShowToLayout(layout):
-        ''' .. caution:: Don't touch this! '''
-        if layout is None: return
-        for item in layout.zSortedItems:
-            if item.layoutItemType == TTkK.WidgetItem and not item.isEmpty():
-                child = item.widget()
-                child._propagateShow()
-            else:
-                TTkWidget._propagateShowToLayout(item)
-
-    def _propagateShow(self):
-        ''' .. caution:: Don't touch this! '''
-        if not self._visible: return
-        self.update(updateLayout=True, updateParent=True)
-        TTkWidget._propagateShowToLayout(self.rootLayout())
-
     @pyTTkSlot()
     def show(self):
         if self._visible: return
         self._visible = True
         self._canvas.show()
-        self._propagateShow()
+        self.update(updateLayout=True, updateParent=True)
 
     @pyTTkSlot()
     def hide(self):
@@ -578,12 +561,15 @@ class TTkWidget(TMouseEvents,TKeyEvents, TDragEvents):
         if visible: self.show()
         else: self.hide()
 
-    def isVisible(self):
+    def isVisibleAndParent(self):
         if self._parent is None:
             return self._visible
         else:
             return self._visible & self._parent.isVisible()
 
+    def isVisible(self):
+        return self._visible
+
     # Event to be sent
     # TODO: Remove This
     def layoutUpdated(self): pass
diff --git a/TermTk/TTkWidgets/window.py b/TermTk/TTkWidgets/window.py
index 86b596e4..a95e614a 100644
--- a/TermTk/TTkWidgets/window.py
+++ b/TermTk/TTkWidgets/window.py
@@ -29,14 +29,24 @@ from TermTk.TTkLayouts import TTkGridLayout, TTkLayout
 from TermTk.TTkWidgets.button import TTkButton
 from TermTk.TTkWidgets.resizableframe import TTkResizableFrame
 
+class _MinimizedButton(TTkButton):
+    __slots__ = ('_windowWidget')
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self._windowWidget = kwargs.get('windowWidget')
+        def _cb():
+            self._windowWidget.show()
+            self.close()
+        self.clicked.connect(_cb)
 
 class TTkWindow(TTkResizableFrame):
     __slots__ = (
             '_title', '_mouseDelta', '_draggable',
             '_btnClose', '_btnMax', '_btnMin', '_btnReduce',
-            '_flags', '_winTopLayout' )
+            '_flags', '_winTopLayout',
+            '_maxBk', '_redBk' )
     def __init__(self, *args, **kwargs):
-        TTkResizableFrame.__init__(self, *args, **kwargs)
+        super().__init__(*args, **kwargs)
         self._title = kwargs.get('title' , '' )
         self._flags = TTkK.NONE
         self.setPadding(3,1,1,1)
@@ -48,31 +58,88 @@ class TTkWindow(TTkResizableFrame):
         # Add the top Layout to keep the windows action buttons
         self._winTopLayout = TTkGridLayout()
         self.rootLayout().addItem(self._winTopLayout)
-        self._winTopLayout.setGeometry(1,1,self.width()-2,1)
         # Close Button
         self._btnClose = TTkButton(border=False, text="x", size=(3,1), maxWidth=3, minWidth=3, visible=False)
         self._btnClose.clicked.connect(self.close)
+        # Max Button
+        self._maxBk = None
+        self._btnMax = TTkButton(border=False, text="^", size=(3,1), maxWidth=3, minWidth=3, visible=False)
+        self._btnMax.clicked.connect(self._maximize)
+        # Min Button
+        self._btnMin = TTkButton(border=False, text="_", size=(3,1), maxWidth=3, minWidth=3, visible=False)
+        self._btnMin.clicked.connect(self._minimize)
+        # Button Reduce_border
+        self._redBk = None
+        self._btnReduce = TTkButton(border=False, text=".", size=(3,1), maxWidth=3, minWidth=3, visible=False)
+        self._btnReduce.clicked.connect(self._reduce)
 
         self._winTopLayout.addItem(TTkLayout(),0,0)
-        self._winTopLayout.addWidget(self._btnClose,0,1)
+        self._winTopLayout.addWidget(self._btnClose, 0,4)
+        self._winTopLayout.addWidget(self._btnMax,   0,3)
+        self._winTopLayout.addWidget(self._btnMin,   0,2)
+        self._winTopLayout.addWidget(self._btnReduce,0,1)
+        self._winTopLayout.setGeometry(1,1,self.width()-2,1)
+        self._winTopLayout.update()
 
-        self.setWindowFlag(kwargs.get('flags', TTkK.NONE))
+        self.setWindowFlag(kwargs.get('flags', TTkK.WindowFlag.WindowCloseButtonHint))
+
+    def _maximize(self):
+        if not (pw := self.parentWidget()): return
+        if self._maxBk:
+            self.setGeometry(*self._maxBk)
+            self._maxBk = None
+        else:
+            bk = self.geometry()
+            maxw,maxh = pw.layout().size()
+            self.setGeometry(0,0,maxw,maxh)
+            self._maxBk = bk
+
+    def _reduce(self):
+        if self._redBk:
+            self.resize(*self._redBk)
+            self._redBk = None
+        else:
+            bk = self.size()
+            self.resize(self.width(),4)
+            self._redBk = bk
+
+    def _minimize(self):
+        if not (pw := self.parentWidget()): return
+        stack = []
+        for li in pw.rootLayout().children():
+            if li.layoutItemType == TTkK.WidgetItem and issubclass(type(w:=li.widget()),_MinimizedButton):
+                stack.append(w.y())
+        stack = sorted(stack)
+        lx,ly = pw.layout().pos()
+        pos = ly
+        for v in stack:
+            if (pos+2) < v or (v+2) < pos:
+                break
+            pos += 3
+        mb = _MinimizedButton(windowWidget=self,text=self._title,border=True,pos=(lx,pos),size=(15,3))
+        pw.rootLayout().addWidget(mb)
+        self.hide()
 
     def setTitle(self, title):
         self._title = title
         self.update()
 
+    def windowFlag(self):
+        return self._flags
+
     def setWindowFlag(self, flag):
         if self._flags == flag: return
         self._flags = flag
-        if flag & TTkK.WindowFlag.WindowCloseButtonHint:
-            self._btnClose.show()
-        else:
-            self._btnClose.hide()
-        self.update()
+        self._btnClose.setVisible( bool(flag & TTkK.WindowFlag.WindowCloseButtonHint))
+        self._btnMax.setVisible(   bool(flag & TTkK.WindowFlag.WindowMaximizeButtonHint))
+        self._btnMin.setVisible(   bool(flag & TTkK.WindowFlag.WindowMinimizeButtonHint))
+        self._btnReduce.setVisible(bool(flag & TTkK.WindowFlag.WindowReduceButtonHint))
+        self._winTopLayout.update()
 
     def resizeEvent(self, w, h):
-        self._winTopLayout.setGeometry(1,1,self.width()-2,1)
+        self._maxBk = None
+        self._redBk = None
+        self._winTopLayout.setGeometry(1,1,w-2,1)
         super().resizeEvent(w,h)
 
     def getTitle(self):
diff --git a/demo/demo.py b/demo/demo.py
index c012d8ee..ed1ba1c4 100755
--- a/demo/demo.py
+++ b/demo/demo.py
@@ -38,6 +38,7 @@ from  showcase.tab           import demoTab
 from  showcase.graph         import demoGraph
 from  showcase.splitter      import demoSplitter
 from  showcase.windows       import demoWindows
+from  showcase.windowsflags  import demoWindowsFlags
 from  showcase.formwidgets   import demoFormWidgets
 from  showcase.scrollarea    import demoScrollArea
 from  showcase.list          import demoList
@@ -91,7 +92,7 @@ def showSource(file):
     content = "Nothing"
     with open(os.path.join(os.path.dirname(os.path.abspath(__file__)),file)) as f:
         content = stupidPythonHighlighter( ttk.TTkString() + f.read() )
-    sourceWin = ttk.TTkWindow(size=(100,40), title=file, layout=ttk.TTkGridLayout())
+    sourceWin = ttk.TTkWindow(size=(100,40), title=file, layout=ttk.TTkGridLayout(), flags=ttk.TTkK.WindowFlag.WindowMaximizeButtonHint|ttk.TTkK.WindowFlag.WindowCloseButtonHint)
     texEdit = ttk.TTkTextEdit(parent=sourceWin, lineNumber=True)
     texEdit.setText(content)
     ttk.TTkHelper.overlay(None, sourceWin, 2, 2)
@@ -198,7 +199,8 @@ def demoShowcase(root=None, border=True):
     listMenu.addItem(f"Windows")
     tabWindows = ttk.TTkTabWidget(parent=mainFrame, border=False, visible=False)
     tabWindows.addTab(demoWindows(),     " Windows Test ")
-    tabWindowsSources = [ 'showcase/windows.py' ]
+    tabWindows.addTab(demoWindowsFlags()," Windows Flags ")
+    tabWindowsSources = [ 'showcase/windows.py', 'showcase/windowsflags.py' ]
     tabWindows.addMenu("sources", ttk.TTkK.RIGHT).menuButtonClicked.connect(lambda x : showSource(tabWindowsSources[tabWindows.currentIndex()]))
 
     listMenu.addItem(f"Extra")
@@ -250,7 +252,7 @@ def main():
 
     root = ttk.TTk(title="pyTermTk Demo")
     if windowed:
-        winTabbed1 = ttk.TTkWindow(parent=root,pos=(0,0), size=(120,40), title="pyTermTk Showcase", border=True, layout=ttk.TTkGridLayout())
+        winTabbed1 = ttk.TTkWindow(parent=root,pos=(0,0), size=(120,40), title="pyTermTk Showcase", border=True, layout=ttk.TTkGridLayout(), flags=ttk.TTkK.NONE)
         border = True
     else:
         root.setLayout(ttk.TTkGridLayout())
diff --git a/demo/showcase/windowsflags.py b/demo/showcase/windowsflags.py
new file mode 100755
index 00000000..dc3aedda
--- /dev/null
+++ b/demo/showcase/windowsflags.py
@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+
+# MIT License
+#
+# Copyright (c) 2021 Eugenio Parodi <ceccopierangiolieugenio AT googlemail DOT com>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import sys, os
+
+sys.path.append(os.path.join(sys.path[0],'../../tmp'))
+sys.path.append(os.path.join(sys.path[0],'../..'))
+import TermTk as ttk
+
+
+class WindowFlagsTest(ttk.TTkWindow):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        rb   = ttk.TTkCheckbox(
+                    parent=self, pos=(0,0), size=(20,1), text='Reduce   Button',
+                    checked=bool(self.windowFlag()&ttk.TTkK.WindowFlag.WindowReduceButtonHint))
+        minb = ttk.TTkCheckbox(
+                    parent=self, pos=(0,1), size=(20,1), text='Minimize Button',
+                    checked=bool(self.windowFlag()&ttk.TTkK.WindowFlag.WindowMinimizeButtonHint))
+        maxb = ttk.TTkCheckbox(
+                    parent=self, pos=(0,2), size=(20,1), text='Maximize Button',
+                    checked=bool(self.windowFlag()&ttk.TTkK.WindowFlag.WindowMaximizeButtonHint))
+        cb   = ttk.TTkCheckbox(
+                    parent=self, pos=(0,3), size=(20,1), text='Close    Button',
+                    checked=bool(self.windowFlag()&ttk.TTkK.WindowFlag.WindowCloseButtonHint))
+
+        def _cbStateChanged(state,field):
+            if state==ttk.TTkK.Checked:
+                self.setWindowFlag(self.windowFlag()|field)
+            else:
+                self.setWindowFlag(self.windowFlag()&(~field))
+
+        rb.stateChanged.connect(  lambda x: _cbStateChanged(x,ttk.TTkK.WindowFlag.WindowReduceButtonHint))
+        minb.stateChanged.connect(lambda x: _cbStateChanged(x,ttk.TTkK.WindowFlag.WindowMinimizeButtonHint))
+        maxb.stateChanged.connect(lambda x: _cbStateChanged(x,ttk.TTkK.WindowFlag.WindowMaximizeButtonHint))
+        cb.stateChanged.connect(  lambda x: _cbStateChanged(x,ttk.TTkK.WindowFlag.WindowCloseButtonHint))
+
+
+
+def demoWindowsFlags(root=None):
+    frame = ttk.TTkFrame(parent=root, border=False)
+
+    WindowFlagsTest(parent=frame, pos = (0,0), size=(40,8), title="Test Window 1")
+    WindowFlagsTest(parent=frame, pos = (2,2), size=(40,8), title="Test Window 2",
+                    flags = ttk.TTkK.WindowFlag.WindowMaximizeButtonHint | ttk.TTkK.WindowFlag.WindowCloseButtonHint)
+    WindowFlagsTest(parent=frame, pos = (4,4), size=(40,8), title="Test Window 3",
+                    flags = ttk.TTkK.NONE)
+    WindowFlagsTest(parent=frame, pos = (6,6), size=(40,8), title="Test Window 4",
+                    flags = ttk.TTkK.WindowFlag.WindowMinMaxButtonsHint)
+    WindowFlagsTest(parent=frame, pos = (8,8), size=(40,8), title="Test Window 5",
+                    flags = ttk.TTkK.WindowFlag.WindowReduceButtonHint)
+
+    return frame
+
+
+
+def main():
+    ttk.TTkLog.use_default_file_logging()
+    root = ttk.TTk()
+    win1 = ttk.TTkWindow(parent=root,pos = (1,1), size=(60,30), title="Test Window Flags", border=True, layout=ttk.TTkGridLayout(), flags=ttk.TTkK.NONE)
+    demoWindowsFlags(win1)
+    root.mainloop()
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file