1. It would be great if we could select multiple layers at once to turn them on or off perhaps by dragging a window through them or holding down control and selecting them. (Normally, you would select multiple layers by selecting the first item you want then hold down the shift key then select the last item you want, but shift is used to move layers.)

2. After selecting multiple layers, it would be nice to turn them all on or off, drag them into a specific folder, change their color or linetype, lock them or even print those layers to a plotter straight from Concept Explorer.

3. It would be nice to be able to change sub layers directly to top level layers or vice versa.

4. It would be nice to copy drawn parts and profiles directly into the symbols in concept explorer.

5. Also storing a little more information with symbols would be helpful. Perhaps having an extra box showing the properties of the symbol.