Whilst it is possible to change the pointed status, when you are in a bike list, press and hold and it is one of the top options this has to be done per point, doing it this way is not really the way the app works, let me explain.
Pointed or not should not be something that is ticked or not ticked, pointed should not mean I have been to see it, pointed in my view is can I remember it, this is very different from I have been there, so I totally believe the pointed status is something that should happen in the revsion process and not as a process of ticking things off on a list.
On the revision screen, the "Don't Know" button sets the point to not pointed, the "Correct" button sets a point to pointed, the "Sticky" button does not change the status either way but marks the point as a sticky point, so revise your points if you remember them then press "Correct" this sets them as pointed in the app.
atb
alex