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, the Tool Settings window for that primitive appears.
You can set attributes that specify the radius, scale, subdivisions, and whether default UV texture coordinates are created with the primitive.
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, such as Move, Rotate, or Scale.
After you create a primitive, you can modify its attributes using either the Channel Box or the Attribute Editor.