Options

X Axis
Y Axis
Z Axis

The Center command lets you specify where the objects should be placed in terms of each axis of the cuboid. You can affect how this command works using the various settings in the dialog.

Figure 1.

Negative and Positive represent the two ends of the corresponding cuboid axis where it crosses the imaginary bounding cuboid. Middle represents the center of that axis. Choosing the dashes disables alignment for the particular axis (see Figure 2, above).

Figure 2.