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I stumbled across a function called PointForm but the only documentation I can find is the pop-up line offered by autocomplete, which contains the same information as Information[PointForm]:

enter image description here

What does this mean and how does it work?

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Graphics3D[{PointForm[Sphere[]], Point[{{0, 0, 0}, {5, 5, 5}}]}] gives "PointForm is not a 3D graphics primitive or directive". Also, apparently it has been there at least since version 7. – Szabolcs Jan 22 '13 at 15:43
Hum, quite a number of symbols reported by ?*Form are internal. I bet they are generated internally by built-ins for the front-end. – carlosayam Jan 22 '13 at 18:40
@Szabolcs It has been there as early as 1994. See this posting – Sjoerd C. de Vries May 10 '13 at 21:09

I don't know how to use PointForm; however, if you want spheres for points:

pts = {{0, 0, 0}, {2.5, 2.5, 2.5}, {5, 5, 5}};

Graphics3D[Sphere[pts, .3]]


Graphics3D[Sphere[#, .3] & /@ pts]
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Or Graphics3D[Translate[Sphere[], pts]] which readily generalizes to other shapes than spheres. – Szabolcs Feb 18 '14 at 5:38

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