As we know "copytolayer" in AutoCAD Express tools copies objects onto one layer at a time. However, we may need to copy the same objects onto several layers at the same time. Of course, we can repeat the operation several times. The drawbacks are 1) easily have duplicates on the same layer if we forget. 2) very tedious if we have many layers. Basically, we can select one layer name in the layer selection window, it will be great if we can select multiple layers just as we can do in LayDel.