In gnome terminal window
GNOME Terminal is a terminal emulator for the GNOME desktop environment written by Havoc Pennington and others. Terminal emulators allow users to access a UNIX shell while remaining on their graphical desktop. wikipedia
Change the title displayed in the terminal window ref
Add one of these setting to your ~/.bashrc
This will automatically change the title even when you add a new tab.
change the size of the window, in this case 40 lines by 80 charactors wide.
12 lines by 160 charactors wide.