Фолдинг

Открытие-закрытие

zo   Open fold
zO   Open all folds
zc   Close fold
zC   Close all folds
za   Switch fold
zA   Switch all folds

zm   Fold more
zM   Close all
zr   Reduce fold
zR   Open all

Создание-удаление

zf   Create fold (Move or Visual)
zF   Create fold for [count] lines
zd   Delete fold
zD   Delete all folds