Mirror a project, is it possible?

Hi there,
I am making a 2 step stool, for my little daughter, with side walls on the two sides, I’m also creating pockets for the steps to slide in so I can adjust the height and disassemble the thing for easy storage.
The issue I have is that I made the design and thought I could just copy the project and mirror so I could have a right side and left side, instead of making two different pieces, is it even possible on easel? I appreciate the help and tips. Thanks l

Mirror a image - Easel - Inventables Community Forum

I tried that method but I’m not using an image so I doesn’t work, unfortunately.
Thanks though.

Deleted…