edit your ~/.bashrc file to change the defauld dimentions of the terminal.
However, it is normally set to 24 lines and 80 columns - could it be that the font you use is too small? In which case, edit the terminal profile from the terminal window Edit > Profiles
make a new profile, base it on default, and set the preferences how you want. Change the "open on new terminal" to your new profile, close the herminal and open a new one.
Last edited by Simon Bridge; 12-14-2008 at 02:22 AM.