1. Go to Settings.
2. Select the Receipt tab. On this page, you will be able to modify the visibility, boldness, font-size, and alignments of several elements on your receipt. Font-size of text can be modified under Main Receipt Area.
3. Press Save.
Tip #1: To manage the general font-size, enter in the preferred value under Size.
Tip #2: To manage the font-size of the modifier items, enter in the preferred value under /.