I often want to switch back and forth between two-page view and one-page view--but that involves touching the screen once, to make the top menu bar appear,... tapping the 'hamburger menu' at top left,... moving down to bottom left, to hit the gear icon for Settings,... and then moving up top again to tap a different Page Mode. Whew! I'd like to be able to put a Page Mode icon in the top menu bar, and change it directly, there. Or at least put the 'Settings' gear icon there...? Or, both! Less searching and tapping, more unbroken focus on the work. Thanks!