Vic Ramon's
Vim Tutorial
Vim has multiple modes. Keys do different things in different modes. The mode you’re in when you’re just moving around is called Normal Mode. To insert new text you’ll need to switch into Insert Mode.
Before we start modifying text, you should know these two things:
u is undo
Ctrl-r is redo
Now you can undo any craziness that occurs. Just hold u until you’re back to where you started.
i switches you into insert mode at the cursor
a puts you in insert mode one space after the cursor
escape puts you back in Normal Mode.
The neat thing about Insert Mode is that there are many ways to get into it, each of which will put you in Insert Mode and move you to the right spot to insert code.
I puts you in insert mode at the beginning of a line
A puts you in insert mode at the end of a line
o puts you in insert mode on a new line (think “open”)
O puts you in insert mode on a new line above your current line.
If you find your pinky getting tired of hitting escape you can use one of these instead:
Ctrl-c
Ctrl-[