GNOME3 and Modifying command-line arguments

[Khemara Lyn]

Dear All,

Normally, I could go "Applications -> System Tools -> Terminal" and the 
app "gnome-terminal" would start and po up a new terminal window with a 
command prompt.

The default terminal size is not optimal for me and i would like to 
adjust it a bit. With previous version (GNOME2), I could just do a 
right-click on the icon and edit "terminal command" to something like this:

"gnome-terminal -geometry 100x35"

But now in GNOME3, I can't find out how to do it any more?

When we browse the program/app menu, we see their icons. When we click 
an icon, the corresponding app will run (with default command set by 
GNOME). How can we modify the command or its arguments from the default 
(as in the example above for gnome-terminal)?

Any help please?

Thanks & regards,
Khem