Mirror an Object
Mirror the selected objects in relation to a selected mirroring line by selecting the  Mirror function from the context-sensitive
      menu. Define the mirroring line by selecting two points on a straight line. You can either
      keep or remove the original geometry of the objects.
 Mirror function from the context-sensitive
      menu. Define the mirroring line by selecting two points on a straight line. You can either
      keep or remove the original geometry of the objects.
- Select one or more objects.
- Right-click to open the context-sensitive menu.
- Select the  Mirror function. Mirror function.
- Select the location of the first point of the mirror line.
- Select the second point of the mirror line.
- Do either of the following:- If you also want to keep the original geometry of the objects, select Yes in the message box.
- If you want to remove the original geometry of the objects, select No in the message box.
 
Note: 
    
  - You can mirror the entire building with the general object function Mirroring All Objects.
