Creating primitives by selecting from the Create menu lets you specify the primitive’s attributes before you create it. Using this method, creates a primitive at the X, Y, Z origin.
To create polygon primitives at the X, Y, Z origin using the Create menu
When you select the beside the primitive, its associated options window appears.
You can set attributes that specify the radius, scale, subdivisions, and whether default UV texture coordinates are created with the primitive. For more information on primitive options see Create > Polygon Primitives.
The primitive object appears at the X, Y, Z origin of the scene view. By default the primitive remains selected so you can perform other operations on it. For example, move, rotate, or scale.
You can modify a primitive’s attributes after you create it using either the Channel Box or the Attribute Editor.