delete multiple task at one time

I would like to be able to select multiple tasks at the same time and delete

I would like to have a way to select multiple task at one time and mark them complete. The task go from in box to everything else box and we have to go in individually and mark each one complete a second time. It is time consuming. Is there a way to avoid this ?
Thanks
Ginger

Thanks for the suggestion, we will consider this for a future version