As a User, I want the ability to add more characters to the product code to have clearer difference between my other items. For example: if I have "Coffee" and "Coffee Bean", I can only have COF as the product code for both of the items (if I use the first 3 characters only).
RCPOS should resize the font (readable) to fit the Item code characters as much as possible. Where it doesn't fit any more, it should truncate it by adding "..." at the end to inform the user of it.
This applies to both Management System and Cash Register.
Product code can be changed by clicking on the button, however it is limited to 3 characters.