Zooming in gedit in CentOS, on Putty Xming

I’m using gedit 2.28.4 on CentOS 6.6, with Xming and Putty. The text is really small and I haven’t found a way to zoom in or increase text size.

http://askubuntu.com/questions/108967/how-to-zoom-in-and-out-of-text-in-gedit mentions a text size plugin but I don’t see it on mine.

Any ideas?