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diff --git a/silx/_config.py b/silx/_config.py
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+#!/usr/bin/env python
+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2017 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__ = "26/04/2018"
+
+
+class Config(object):
+    """
+    Class containing shared global configuration for the silx library.
+
+    .. versionadded:: 0.8
+    """
+
+    DEFAULT_PLOT_BACKEND = "matplotlib"
+    """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
+
+    .. versionadded:: 0.8
+    """
+
+    DEFAULT_COLORMAP_NAME = 'gray'
+    """Default LUT for the plot widgets.
+
+    The available list of names are availaible 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
+    """