Editing `Polls'

I need some help in figuring out how to `edit' an existing poll.

Since I haven't been a very active user of `polls' this comment may reflect my naivety. But I figure it is better to make it anyway, on the offhand chance it reflects a shared opinion.

I think I'd be more tempted to use `polls' if they could be edited to add and/or remove possible answers. Of course, I understand that there may be conceptual problems for some in changing the poll after it has started, but I wonder if this shouldn't be left up to the person running the poll. In my case, I find I think of useful additions after polls have started, and if I can't make them, my response is to simply not use the feature.