Is it there in draftsight an equivalent of AUTOCAD "flatten" command?

Good afternoon, 

I'm working on a 2D drawing inherited from another company, and different lines won't fillet as they're not on the same plane. When I was using Autocad I fixed the issue with the FLATTEN command which set everyting seleced on plane z=0. Is it there in Draftsight any procedure to do this?

I would really appreciate any hint. Thank you.