Topic Title

My clipboard select toggles selections. This could be a very useful feature, but with it alway working it is causing me some hassle. If I make a selections, but don't get everything, then area to get the entities I missed, it unselects any that I had previosly selected within the area box. Is there a way to "toggle" this funstionality off.

I see the option to "Del from Set". It makes more sense to me to have an "Add to Set" and a "Toggle from Set" as well.