I second that. But, enhance it with a toggle or ability to permit working on or measuring from or to items on the layer, then reverting the layer to an off status without undoing the edits. This could be great for certain activities.

Possibly, another enhancement could be to tell the layer to come on, but show all objects TOUCHING objects in the layer. This might be useful for activating floors or walls that touch but really are on separate management layers. This might facilitate looking for missing or redundant features in a very quick way since it means one need not hunt down layers (i have over 100 i think in one model now, and when in need certain combinations turned on and other off, it means LOTS of scrolling and ctrl-clicking or shift-clicking) and one need not turn on ALL the layers (which can (in my case) crash the model).

Yet another think i'd like is a horizontal and verticle management of layer on/off toggling. For example, for view and verification management, i identify major divisions of my ship model horizontally by AA, BB, CC, etc out to QQ. But for vertical divisions within those, there are 6 more layer or decks in some, and will be 10 or twelve layers/levels in around two of those. If the layers management could have an overlay that mimiced the overall breadth and depth and length of the model it would be awesome. Maybe it could be added to the View Ball.

Sometimes i create a piece of geometry that gets drowned out by the huger surrounding objects after doing a zoom-all. Can there be a way (like in windows) to hit some designated key to draw a pulsing or expanding or glowing circle or sphere on selected geometry?

It would be nice, too, if the marker can remain "on" so that measurements can be taken.