Autodesk Revit: Mirroring Elements

In this Autodesk Revit tutorial, I am going to show you how to use the “Mirror” tool. We’ll take a look at both utilising a pre-defined axis and also drawing your own. Before reading the written tutorial, you may wish to view the video version first……



When you mirror an element in Revit, you need to use a “mirror axis”. This is a plane along which the element will be mirrored. You can either define this plane yourself (at the time you perform the mirror function), or you can use an existing plane in the model- such as the face or centreline of an existing element. I’ll show you both methods in this tutorial. Let’s first look at the method with utilises an existing plane to form the mirror axis.

In the image below you can see we have an external wall with a window (1) placed into it. We also have an internal partition wall (2) that joins the inner face of the external wall at a right angle. What we are going to do is mirror the existing window (1) on the centreline of the partition wall (2), so that a mirrored copy is created at position (3)…..



First of all switch to the “Modify” menu and activate the “Mirror” drop-down (2). From here you will see the two options for mirroring elements. We are going to “PICK” an axis from the model- so consequently we need to choose “Mirror- Pick Axis” (3)…..




Now go ahead and pick the element we wish to mirror. Go ahead and click on the window to select it. Once you have selected the window, press either the space bar or “Enter” on your keyboard to tell Revit that you have finished selecting all your elements to be mirrored.


You now simply have to pick an axis (from within the active window) to act as a mirror plane. Carefully hover your cursor over the partition wall. Notice how Revit will highlight in blue all the planes that can act as a mirror axis. When the centreline of the partition wall highlights….



…go ahead and click on it to select. Immediately the window is mirrored about this plane. You now have an external wall with two window elements- both equal distances from the centreline of the internal partition.



There will be time when you need to mirror elements in your model- but you don’t have a face / plane about which you can mirror. In these cases, you are going to have define the plane yourself as part of the mirroring process. Take the freestanding desk below (1)….



Let’s say we want to mirror it to position (2). There is no plane in between these two positions for us to use. In this scenario we need to choose the “Mirror- Draw Axis” option from the Mirror drop-down menu…..




As before, go ahead and select the object to be mirrored. Then hit the space bar or Enter key to confirm your selection. Revit now needs you to draw the axis you wish the element(s) to be mirrored about. This is a simple 2 click operation. You simply click a start and end point for your plane, in the active view. In the image below you can see that I’ve created a vertical (with respect to the view’s orientation) plane by clicking at (1) and (2)….



As soon as you click the end point, the plane is defined and Revit can mirror the element(s) accordingly…..



Just a final note on the mirroring process: When you select either of the mirror options, the Options Bar displays a “Copy” checkbox. This let’s you choose whether you wish Revit to leave a copy of the element in it’s original place once it mirrors the element about the mirror axis. This option is turned on by default.




Key Points

  • You can mirror elements about an existing face or plane in your model
  • You can draw an axis to mirror about- as part of the mirroring process
  • You can choose whether a copy of the mirrored object is left in it’s original location.
This tutorial is taken from "The Complete Beginner's Guide to Revit Architecture" FREE online course.
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Posted in Autodesk Revit.