I have two lines in my .vimrc file:
map <S-Enter> O<Esc>
map <CR> o<Esc>
The second line works as expected, but the first line does not.
The idea is that if I hit the Enter key then vim should insert a new line below the cursor position and move the cursor down to that line. If I hit Shift-Enter, vim should insert a new line above the cursor position and move the cursor up to that line. This mapping should work because the capital O key from normal mode will insert a newline above the line the cursor is on, place the cursor at the beginning of that line, and then place the user into insert mode. Capital O followed by <Esc> should simply revert vim back to command mode.
I have checked and capital O works as I expect. So why doesn't my mapping work? I have tried using map <Shift-CR> and map <Shift-Enter>, and neither of those does the trick.
EDIT Turns out it works in MacVim but not in iTerm. If anyone can explain why and suggest a workaround, I'd appreciate it.