Okay this a fairly easy tip but a huge time saver if your constantly using the terminal. I’ll show you a quick way to open up a terminal and set it’s window size. Obviously you need to be using Compiz along with the “CompizConfig Settings Manager”. If you don’t have CompizConfig Settings Manager installed just:
sudo apt-get install compizconfig-settings-manager
Now go to System > Preferences > CompizConfig Settings Manager. Inside the Settings Manager application select the “Gnome Compatibility” button. And from there select the “Commands” tab.
Within this dialog you can set the terminal command you would like to run. Typically you can just use gnome-terminal but we want to go a little further than that. Adding the –geometry tag, you can set the size of the terminal window. It should look like this:
After that you’re done. Quick and easy and now when you want a terminal: Control + Space Bar.