Mirror your component, horizontally or vertically. These are all the properties of Mirror and what they do:
A label that you can use to easily identify this step.
If you flip this switch, your step so far will be mirrored along the X axis.
If you flip this switch, your step so far will be mirrored along the Y axis.
Allows you to turn off this step programatically. If this field has any contents, then it will be processed by the template engine. If after processing the field has any value other than empty or 0, It will render. If it is empty or 0, it will not render, much the same as if you had disabled it.
Most people will not use this step, however, the reason it exists is that it can help you in a couple of situations:
The first situation is when you have some art that you want to appear mirrored in your design. You may draw that in one corner, and then use the mirror step, and then duplicate the steps before the mirror to produce the art a second time. Rinse and repeat as many times as necessary to achieve the desired effect.
The second situation is when you are finding it difficult to think about something upside down or in reverse. It may be easier to draw it in one way, and then mirror it into position.