The Remove Alignment Points from non-DM Drawing command is used to remove all alignment points from a drawing that does not use Design Master features. This command is the only way to fully remove alignment points from a drawing.
To remove all alignment points from a drawing, go to
Ribbon: DM Plumbing->Alignment Points-> 
Remove Alignment Points from non-DM Drawing
Pulldown Menu: DM Plumbing->Alignment Points->Remove Alignment Points from non-DM Drawing
Remove Alignment Points from non-DM Drawing Dialog Box
To remove the alignment points, type REMOVE and press the OK button. This step helps prevent you from removing the alignment points accidentally.