Unix Screen command is an indespensable command. Once you know it you cannot live without it. It is window manager. Just try it and you will find it mind blowing.
A new screen can be created using
Ctrl-A c - Create new window
Ctrl-A A - Name a window
Ctrl-A " - Show all windows.
Ctrl-A S split window.
Ctrl-A tab to move to the next window.