Jani,
Is it possible to make a button to select zoom?
Some times once i open the app gauges comes bigger than normal and i cannot touch the top of the page to select setting from there.
Try tapping a few millimetres up or down of the top centre, you will see the zoom pop up on the right side.
Thanks,
i doing that sometimes but it takes a lot of time and it needs some anger management skills 
)
Regards