Osmos offers options to customize your values. You can
customize values like: Discounts, methods of payment, promotions,
delivery methods, sales taxes, currency, invoice number, attachments, units,
etc...
To customize and view the different values go to Setup -> System Values

Here you
will find most of the system values used in Osmos:
To delete
click on the garbage can
To edit
click on the text
To add
a new method select the "+" icon
In some cases, you can mark a value as predefined.