The Mirror allows you to mirror your shape on one or all axes at once. Here’s how this works.
In this lesson:
When you have a primitive selected, it will open up its properties menu on the right in the Object tab. At the bottom you’ll find the “Mirror” where you can activate the mirror on all axes, and create your own custom mirror planes. Click on the “+” icon to add a mirror plane.
The Mirror will always be in the centre of the scene at (0,0,0) unless you create a union which will then dictate a new centre of the mirror.