.. _rna_enum_curve_normal_mode_items:

Curve Normal Mode Items
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:MINIMUM_TWIST: Minimum Twist.

   Calculate normals with the smallest twist around the curve tangent across the whole curve.
:Z_UP: Z Up.

   Calculate normals perpendicular to the Z axis and the curve tangent. If a series of points is vertical, the X axis is used..
:FREE: Free.

   Use the stored custom normal attribute as the final normals.
