PhotoShop Elements 10...I need help with font size for watermark in Processing Multiple Files.....

I have PhotoShop Elements 10, and I am trying to watermark some of my photos, I have successfully added them one at a time with a font large enough to be seen. Now I am trying to add it using the "process multiple files" , I can do that but the font even at 72 the largest setting is so small on the photo you can barely read it! Can anyone help me the size larger on my photos?