Option to temporarily and quickly Disable the Top Tabs. In a way... like the toggle to go from View to Edit Mode and back. Basically need a button to press... to turn off the tabs. Pressing the button again will turns the tabs back on.

I am left-hander. Apparently, I also "write-up-side-down". See Image.

Because of this.. my palm constantly hits the tabs - and the notebook will changes. This happens all the time. Everyday. Multiple times a day.