Yes. Besides the builtin font, you can install your own font into EasyBilling.

1. In main screen of EasyBilling, click menu “Settings” > “Install Font”.
2. The “Font List” is shown.
   
3. You can add your font by clicking “Add” icon .
4. “Install Font” dialog is shown.
   

   Specify the font name and the font file. The font should be a true type font in TTF or TTC format. You can also provide bold and italic variants of the font. These two variants are optional.

5. After installation, the newly added font will be available. You can select new font in Menu Bar on the document window.
   

Video: Setting document font