terminator

Arrange multiple GNOME terminals in one window. More information: https://gnome-terminator.org/.

• Start terminator window:

terminator

• Start with a fullscreen window:

terminator -f

• Split terminals horizontally:

<Ctrl> + <Shift> + O

• Split terminals vertically:

<Ctrl> + <Shift> + E

• Open new tab:

<Ctrl> + <Shift> + T