Aptana Studio 3 - text font size minimizing with Ctrl + -

hello I have recently installed aptana studio 3 again and I am having where my text font size minimizes when I do the command (Ctrl + -). I am talking about the font under `General->Appearance->Colors` and `Fonts->Basic->Text Font`. This command works like in photoshop/illustrator where the size minimizes. However I do not want this command because I usually press it on accident. I have looked under keys and I can't find this command so I can change it. It wouldn't be so bad but the command Ctrl + + doesn't upsize the font like it normally does in other applications. Any suggestions?