Whenever I try to use speech recognition on my Android phone, it's frustrating because when it recognizes the wrong word, there's no way (that I know of) to del

Whenever I try to use speech recognition on my Android phone, it's frustrating because when it recognizes the wrong word, there's no way (that I know of) to delete a word or move the cursor. Also when I try to put a period in (we call them "full stops" in Australia), half the time it inserts a period, and the other half it literally writes "period". I would like to see some documentation on how to use it better, I had a go at googling for some a while back but couldn't find anything useful. I ended up with the impression that such editing commands weren't implemented. I still have a go every now and then to see if its improved with updates, but it's basically unusable in its current state.