Unlike most other printers, you are not limited to a small set of fonts to choose from, or to print the personalization info in only Black or Red ink. The font will be whatever font your prefer. You would need to provide us the font. The default font, if no font is specified or provided will be Arial. Ideally, your artwork should be set up as a PDF with an example line of the personalization in the actual font and color you prefer. You would then also upload the spread sheet (such as XLS or CSV file) with the changing lines of data.