Operation Manual needs improvement

When you open the key commands window, there are several functions that are unexplained in the manual. I can’t find any information about them in the documentation. For instance, there is a category called “Focus”. There are several functions which have no description, so I have no clue what they do. At the very least, it would be helpful to know what part of the program the key command applies to.

Here are two solutions:

-Best solution: On the key commands menu, have a block of text that describes what each key command does. This text would appear when a command is highlighted.
-Next best solution: Have a PDF document that describes what each key command does. People can search through it using CTRL+F to find the function they want to know more about.