When I click on menus I get a sub menu popup. I.E.
![image.png](//image.easyeda.com/pullimage/by8oObDGHD5joogRAlvz2XNjy4lk62ndysBYqAOZ.png)
In this menu are various letters enclosed in parentheses.
What are they I.E. (O) on Zoom Out,
![image.png](//image.easyeda.com/pullimage/gzd9B8oyOdSjdVuHfyVFGafsmeAwxbTx0iGY64jK.png)
Pressing "O" doesn't do anything. Pressing "F" for Fit All in Window doesn't do anything either but the totally illogical "K" Fits Everything in the Window.
Is there some logic to this that I'm not seeing?