Edit Mesh > Poke Face

User Guide > Modeling > Polygonal Modeling > Polygons menus > Edit Mesh >

Splits the selected faces to let you push or pull the center of the original polygon.

For example, a four-sided polygon (quad) is split into 4 three-sided polygons with one shared vertex in the middle. A manipulator appears after the Poke Face operation to let you further transform the vertex.

Vertex offset: Specifies the X, Y, Z direction and distance the new vertex will be offset from the original face.

Offset space

Determines the coordinate space for the offset.

World: Specifies the offset in world space units. That is, the vertex will be offset based on absolute X, Y, Z values.
Local: Specifies the offset in local space units. That is, the vertex offset will occur relative to the object units.