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Overview
--------
A `plot tool` is an object providing various features to a plotting widget
(:py:class:`.BasePlot`):
* Buttons,
* Menus,
* Selection tools,
* Image I/O tools,
* Etc.
Before being used, a tool has to be registered to a plotting widget's manager,
i.e. an instance of the :py:class:`.PlotManager` class (see :ref:`plot`
for more details).
The :py:class:`.BasePlot` widget do not provide any :py:class:`.PlotManager`:
the manager has to be created separately. On the contrary, the ready-to-use widget
:py:class:`.PlotWidget` are higher-level plotting widgets with
integrated manager, tools and panels.
.. seealso::
:ref:`plot`
Ready-to-use curve and image plotting widgets and dialog boxes
:ref:`items`
Plot items: curves, images, markers, etc.
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