Vim Multi-window editing commands

Simple and practical, not much, no perfection.
Open multiple files at the same time vim file1 file2 file3
In the same window, switch between different files: bn-to-next file: BP--and previous file
Separates the current window horizontally: Split
Vertically separates the current window: Vsplit
Cursor switching between different Windows Ctrl+w double-click (Hold CTRL, press W again two times)

Multi-Window Simple separation: Horizontal: Vim-o file1 file2 file3 Vertical: vim-o file1 file2 file3
Open the file again in vim already open: Open filename

Vim Multi-window editing commands