To check all Transaction categories in Splynx click on
Config → Finance → Transaction categories.
Transaction categories listed here are set by default:
You can add a new Transaction category manually by clicking on Add icon at the top-right corner of the screen:
You can also correct the name of the Transaction category or delete it by clicking on icon
On the list of particular customer's transactions in
Customers → View →Billing →Transactions the category of every transaction made by this customer will be seen:
If you will create any new transaction manually for the customer you can also choose its category: