The "esc" key often does this.
You can activate options for commands by pressing the Alt key or the F10 key.
A natural sign cancels all applicable accidentals in that bar as well as accidentals in the key signature. However, in the case of the key signature accidentals, the natural sign is only applicable to that bar.
The Shortcut key can be used for selecting some commands. There are also many specific shortcut key combinations for commands and there are the Function keys.
Key Tip Badge
Key Tip badge
Key Tip Badge
there is no list persay but help in the consel (press ~ key) should give you commands but for a list of commands and what they do just google css consel commands
Generally the keyboard. The mouse can also be used if the commands are click-able buttons in a GUI environment.
A natural cancels a sharp or flat.
I HAVE NO IDEA!!
When making a title, starting a sentence, and doing commands