zf#jcreates a fold from the cursor down # lines.
zf/stringcreates a fold from the cursor to string .
zjmoves the cursor to the next fold.
zkmoves the cursor to the previous fold.
zoopens a fold at the cursor.
zOopens all folds at the cursor.
zmincreases the foldlevel by one.
zMcloses all open folds.
zrdecreases the foldlevel by one.
zRdecreases the foldlevel to zero -- all folds will be open.
zddeletes the fold at the cursor.
zEdeletes all folds.
[zmove to start of open fold.
]zmove to end of open fold.