How I can increase the font size of my terminal.

I need to use the terminal only as a telnet client, and I'd like to make the content of the windows fits perfect the windows it selfe.

But it's ok even if I can just increase the font size in order to read beter the words.

What I've already done:
I've already modified the ~/.Eterm/theme/Eterm/user.cfg line where the fonts informations is seted, but was not able to increase the fonts.

Why is so complicated?