The assembly editor menu has several options and tools to assist you during the creation of new things.
View -> Axes
Use this option to display the x,y and z axes on top of the 3D view.
View -> Ground
This option controls the display of the ground plane ( y = 0 ).
View -> Male / View -> Female
Lets you switch the gender of the body.
Commands -> Edit Posture
Starts the posture editor dialog.
Commands -> Set Background Color
Allows you to change the background color of the 3D view.