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-.. _filters_page:
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-About filters
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-**Filters** allow picking only the mesh elements satisfying to a specific condition or a set of conditions. Filters can be used to create or edit mesh groups, remove elements from the mesh, control mesh quality by different parameters, etc.
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-Several criteria can be combined together by using logical operators *AND* and *OR*. In addition, a filter criterion can be reverted using logical operator *NOT*.
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-Some filtering criteria use the functionality of :ref:`mesh quality controls <quality_page>` to filter mesh nodes / elements by specific characteristic (Area, Length, etc).
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-The functionality of mesh filters is available in both GUI and TUI modes:
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-* In GUI, filters are available in some dialog boxes via "Set Filters" button, clicking on which opens the :ref:`dialog box <filtering_elements>` allowing to specify the list of filter criteria to be applied to the current selection. See :ref:`selection_filter_library_page` page to learn more about selection filters and their usage in GUI.
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-* In Python scripts, filters can be used to choose only some mesh nodes or elements for the operations, which require the list of entities as input parameter (create/modify group, remove nodes/elements, etc) and for the operations, which accept objects (groups, sub-meshes) as input parameter. The page :ref:`tui_filters_page` provides examples of the filters usage in Python scripts.
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-.. toctree::
- :maxdepth: 2
- :hidden:
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- selection_filter_library.rst
