Which one of these is not a type of creation in the Text command?

In the context of the Text command within Siemens NX, the types of text creation functions are designed to allow users to place text in relation to their design geometry. The options provided refer to common methods for generating text in a modeling environment.

The reason why 3D Text is not considered a valid type of creation within the Text command is that this command typically deals with creating text that is either flat (planar) or follows a specific path, such as a curve or a face of a model. On Curve allows text to follow the curvature of a specified line, Planar Text lets you create text on a flat surface, and On Face positions text directly on the geometry of a model's face.

3D Text, while it is a common concept in graphic design and other CAD applications involving more complex text creation (like adding depth or volume), does not align with the specific functionalities provided by the Text command in Siemens NX. Thus, it stands apart from the other listed options, which are all valid methods within the software's capabilities.