Hi All
After searching from internet, I have found following three ways to change elevation of all entities to Zero in a drawing :-
1.) Express Tools FLATTEN command
2.) (command "_change""_all""""p""e""0""")
3.) (command "_move""_all""""""0,0,1e99""_move""_all""""""0,0,-1e99")
My question : Is the output of above three options exactly the same ? If yes, it means we can use any of them. If not, which one to use in which situation ?