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diff --git a/src/silx/_config.py b/src/silx/_config.py
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+#!/usr/bin/env python
+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2017-2019 European Synchrotron Radiation Facility
+#
+# 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.
+#
+# ###########################################################################*/
+"""This module contains library wide configuration.
+"""
+
+__authors__ = ["V. Valls"]
+__license__ = "MIT"
+__date__ = "09/11/2018"
+
+
+class Config(object):
+    """
+    Class containing shared global configuration for the silx library.
+
+    .. versionadded:: 0.8
+    """
+
+    DEFAULT_PLOT_BACKEND = "matplotlib", "opengl"
+    """Default plot backend.
+
+    It will be used as default backend for all the next created PlotWidget.
+
+    This attribute can be set with:
+
+    - 'matplotlib' (default) or 'mpl'
+    - 'opengl', 'gl'
+    - 'none'
+    - A :class:`silx.gui.plot.backend.BackendBase.BackendBase` class
+    - A callable returning backend class or binding name
+
+    If multiple backends are provided, the first available one is used.
+
+    .. versionadded:: 0.8
+    """
+
+    DEFAULT_COLORMAP_NAME = 'gray'
+    """Default LUT for the plot widgets.
+
+    The available list of names are available in the module
+    :module:`silx.gui.colors`.
+
+    .. versionadded:: 0.8
+    """
+
+    DEFAULT_PLOT_IMAGE_Y_AXIS_ORIENTATION = 'upward'
+    """Default Y-axis orientation for plot widget displaying images.
+
+    This attribute can be set with:
+
+    - 'upward' (default), which set the origin to the bottom with an upward
+        orientation.
+    - 'downward', which set the origin to the top with a backward orientation.
+
+    It will have an influence on:
+
+    - :class:`silx.gui.plot.StackWidget`
+    - :class:`silx.gui.plot.ComplexImageView`
+    - :class:`silx.gui.plot.Plot2D`
+    - :class:`silx.gui.plot.ImageView`
+
+    .. versionadded:: 0.8
+    """
+
+    DEFAULT_PLOT_CURVE_COLORS = ['#000000',  # black
+                                 '#0000ff',  # blue
+                                 '#ff0000',  # red
+                                 '#00ff00',  # green
+                                 '#ff66ff',  # pink
+                                 '#ffff00',  # yellow
+                                 '#a52a2a',  # brown
+                                 '#00ffff',  # cyan
+                                 '#ff00ff',  # magenta
+                                 '#ff9900',  # orange
+                                 '#6600ff',  # violet
+                                 '#a0a0a4',  # grey
+                                 '#000080',  # darkBlue
+                                 '#800000',  # darkRed
+                                 '#008000',  # darkGreen
+                                 '#008080',  # darkCyan
+                                 '#800080',  # darkMagenta
+                                 '#808000',  # darkYellow
+                                 '#660000']  # darkBrown
+    """Default list of colors for plot widget displaying curves.
+
+    It will have an influence on:
+
+    - :class:`silx.gui.plot.PlotWidget`
+
+    .. versionadded:: 0.9
+    """
+
+    DEFAULT_PLOT_CURVE_SYMBOL_MODE = False
+    """Whether to display curves with markers or not by default in PlotWidget.
+
+    It will have an influence on PlotWidget curve items.
+
+    .. versionadded:: 0.10
+    """
+
+    DEFAULT_PLOT_SYMBOL = 'o'
+    """Default marker of the item.
+
+    It will have an influence on PlotWidget items
+
+    Supported symbols:
+    
+        - 'o', 'Circle'
+        - 'd', 'Diamond'
+        - 's', 'Square'
+        - '+', 'Plus'
+        - 'x', 'Cross'
+        - '.', 'Point'
+        - ',', 'Pixel'
+        - '',  'None'
+
+    .. versionadded:: 0.10
+    """
+
+    DEFAULT_PLOT_SYMBOL_SIZE = 6.0
+    """Default marker size of the item.
+
+    It will have an influence on PlotWidget items
+
+    .. versionadded:: 0.10
+    """