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Object Data
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Meshes
   The mesh :ref:`Data-Block Menu <ui-data-block>` can be used to link the data between objects.


Normals
=======

In geometry, a normal is a direction or line that is perpendicular to something,
typically a triangle or surface but can also be relative to a line, a tangent line for a point on a curve,
or a tangent plane for a point on a surface. Normals help to determine the shading of the mesh among other things.

See :ref:`Normal Properties <modeling_meshes_editing_normals_properties>` for more information.


Texture Space
=============

Each Object can have an automatically generated UV map, these maps can be adjusted here.

See :ref:`Generated UV Properties <properties-texture-space>` for more information.


Vertex Groups
=============

Vertex groups can be used to assign a group or weighted group to some operator.
An object can have several weight groups and can be assigned in
:doc:`Weight Paint </modeling/meshes/properties/vertex_groups/vertex_groups>` mode,
or in :doc:`Edit Mode </modeling/meshes/properties/vertex_groups/assigning_vertex_group>` via this panel.

See :doc:`Vertex Groups </modeling/meshes/properties/vertex_groups/index>` for more information.


Shape Keys
==========

Shape Keys can be used to transform one shape into another.
See :doc:`/animation/shape_keys/shape_keys_panel` for more information.


UV Maps
=======

UV Maps are used to map a 3D object onto a 2D plane that determines where a texture appears on the 3D object.
Different UV Maps can be used for different textures. For more information see :ref:`uv-maps-panel`.


Vertex Colors
=============

Color data can be applied directly to an object's vertices rather than using a texture or a material.
Colors can are painted onto vertices in :doc:`Vertex Paint </sculpt_paint/painting/vertex_paint/index>` mode.


Geometry Data
=============

Mesh objects can have different types of custom data attached to them.
This data is mostly used internally and can export by some :doc:`exporters </data_system/files/import_export>`.
See :doc:`/modeling/meshes/properties/custom_data` for more information.