Use the Mirror dialog to mirror selected elements in the active Face window. When working in:
To display the Mirror dialog, select the elements that you want to mirror in the active Face window, then select Edit > Transform > Mirror.
The following settings are available:
Multiple Copies — Select this option to copy the selected elements. When mirroring elements, only one copy is allowed, as displayed in the No. of Copies field.
Mirror Axis (PM) — Select whether to use the Horizontal axis, Vertical axis or an Inclined axis for mirroring the selected elements.
Angle (A) — Enter the angle for mirroring the selected elements when using an Inclined axis.
Center (P) — Specify the center point for mirroring the selected elements. There are two ways to specify the center:
Mirror — Click to mirror the selected elements using the settings specified in the dialog.