The General Settings are applied globally in the app.
Click on the options menu button that is the same in all the app modes and select the Settings option.

 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
The Large fretboard view option is visible only if user's device has been identified as a tablet. Check this option to display the fretboard in a large size.