你真的想从:help vim-modes得到更多吗？

Insert Select mode  Entered when starting Select mode from Insert mode.
                    E.g., by dragging the mouse or <S-Right>.
                    When the Select mode ends, Vim returns to Insert mode.
                    If the 'showmode' option is on "-- (insert) SELECT --"
                    is shown at the bottom of the window.