If you make typing errors using your iPad –and who doesn’t’, a great feature is the cursor ‘trackpad’.
Basically wherever the on screen keyboard is available, place two fingers down together on the keyboard and the letters all fade away leaving your mouse cursor to follow where you drag your fingers.
Thus it’s easy to get to the place where your spelling errors are located. Let go at the right spot and make your changes.
Actually you can do the same thing by holding and spreading two fingers across the text area to make the cursor travel like a trackpad.
Try it, it’s really useful.