** Sorry, I found all the settings at the bottom of that page. Thanks for the help!**
Great! I didn't know I could change this. One more stupid question though: where do I make the changes?
I found this in the WAVT_CaptchaSecurityImages.php:
function addGrid($image,$freq,$width,$height,$color)
I don't know where the $freq value is being fed from. I didn't see it on the actual form page.