I checked the settings page and I did a search in the help so excuse me if this has can already be done and I just don't know how to do it.

On the "Today" overview tab it would be great to have a list under the uncompleted tasks of the tasks that HAVE been completed. I know I can't be the only one that get's a psychological boost from seeing a list of items I have already finished for the day. It might even be nice to have color signifier like 1-3 has orange-blue maybe the completed items could have a color of green.