Search MDN docs
The command system brings a handy set of useful and convenient commands to you. Each command starts with a : (colon), followed by the name, and function differently in individual. Those commands including but not limited to:
:help- Show the help messages.
:history- Show your local search history
Page down/up easily
You can press
space after the keyword, then increase or decrease the number of - (hyphen) to page down or page up.