General Planes
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Dialog Box - called from: Display Menu

3D Drawing modes only.

This allows insertion of general planes.

The planes are defined in terms of corners (points) in fractional coordinates on the structure (crystal) axis system. The points must define a convex planar polygon in correct order. The planes are two-sided, so the sequence 1-2-3-4 is equivalent to 4-3-2-1.

Complete parallelogram. If this box is checked and there are only three points, a fourth point will be added such that side 3-4 will be parallel to 2-1 and 4-1 will be parallel to 3-2. If the box is not checked, three points will define a triangle.