Hello, I am desperate to find the correct AUTOLISP syntax for the AutoCAD "FLATTEN" comamnd. I have the user select the entities, then type "flatten" and "no" for remove hidden lines. I cannot figure out what the correct syntax is. Please HELP! (setq ss1(ssget)) (command ".......flatten? "n") (command "pedit" (ssname ss1 0) "y" "j" (princ ss1) "" "c" "") Thank you, Vlad