:e[dit] file - edit a file in a new buffer
:ls or :buffers - list all open buffers
:bn[ext] - go to the next buffer
:bp[revious] - go to the previous buffer
:b[uffer]# - go to a buffer by index #
:b[uffer] file - go to a buffer by file
:bd[elete] - delete a buffer (close a file)
:sp[lit] file - open a file in a new buffer and split window
:vs[plit] file - open a file in a new buffer and vertically split window
:vert[ical] ba[ll] - edit all buffers as vertical windows
:tab ba[ll] - edit all buffers as tabs
Ctrl + ws - split window
Ctrl + wv - split window vertically
Ctrl + ww - switch windows
Ctrl + wq - quit a window
Ctrl + wx - exchange current window with next one
Ctrl + w= - make all windows equal height & width
Ctrl + wh - move cursor to the left window (vertical split)
Ctrl + wl - move cursor to the right window (vertical split)
Ctrl + wj - move cursor to the window below (horizontal split)
Ctrl + wk - move cursor to the window above (horizontal split)