When I enable Pan/Zoom, another toolbar row shows up. Within that 2nd row of the toolbar, there is a rectangled "+" icon that is supposed to adjust focus. Doesn't do anything; i.e., no change no matter how many times I tap on the + or - buttons. Similarly there is an circular icon for "Iris". That doesn't do anything, either. Are they supposed to do anything?
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Phone: Samsung Galaxy Core Prime (Tracfone locked)
Phone OS: Android 4.4.4 KitKat
Amcrest camera: IP3M-941
Amcrest app: View Pro 3.41.0204