1. A method of positioning a three-dimensional (3-D) graphical objects displayed in a virtual 3-D drawing space, the method comprising: outputting for display, the virtual 3-D drawing space comprising a plurality of 3-D graphical objects; receiving a user request to activate a z-layer view; outputting for display within the virtual 3-D drawing space an object control interface that controls movement of a group of 3-D graphical objects, the object control comprising a scaled representation of the group of 3-D graphical objects; receiving a control input to move the object control along a z-axis in a direction; and in response to the control input, moving the group of 3-D graphical objects along the z-axis in the direction.