Mirror mode while building

[ELX987]

Basically mirrors placement/replacement/removing of elements and voxels across a given axis, there are a few games I remember having this tool (star made and avorion to name a few), I think it would be a huge QOL(quality of life) improvement for building as It would speed up large amounts of element placing, make building much more streamlined and create a lot more lined up/equal sided builds

 

If this was already suggested then consider this an upvote :D