Mirrored Model?

[charli xavier]

Hello,

Hopefully I'm in the right topic. 

I've been having fun creating my MOC  comparateur mutuelle chat  design with stud.io, LDraw, and LDD. But I've always wondered: Is there a lego program out there that will mirror a model? 

In my design, I have many symmetrical parts, so this would definitely be cool

-Luis

Hello! 
This is a good article because there are many tips and also many advices that will be very useful to me.
Thanks!