# Custom settings

{% hint style="info" %}
If you already checked the Alias settings this is pretty much the same system.
{% endhint %}

<figure><img src="https://2898862866-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Faq7DRi6TJ3qj6MTV3ep9%2Fuploads%2FJlokfrQJSyO89LLpUmo8%2FInvoiceNumerbingSettigs3.PNG?alt=media&#x26;token=696b5537-cd8d-4356-973a-c8f9fe82a222" alt=""><figcaption></figcaption></figure>

#### Custom Options

As you can see there are 2 options.

**Required** -> Custom Invoice Numbering Format

Optional 2 -> Custom Numbering Start with

Lets give you an example so you understand how the options effect your import and invoice options. With the data above we will have following result.

\
For the Invoice format Byller will use CUSTOM as prefix followed by XXXXX which gonna be replaced by 00001 counting upwards. Would result in -> CUSTO&#x4D;**-00000**\
\
However as we have 880 in the Custom Numbering Start option it would start to count at 880 which would result in -> CUSTO&#x4D;**-00880**

#### Format Settings

xxxxx -> upcounting number -> 00001

mm -> current month -> example october -> 10

yyyy -> current year -> 2022\
\
Examples with different prefixes, month october and year 2022.\
\
ALIAS-mm-xxxxx -> ALIAS-10-00001\
ALIAS-yyyy-xxxxx -> ALIAS-2022-00001\
WHATEVER-xxxxx-mm -> WHATEVER-00001-10\
xxxxx-WHATEVER -> 00001-WHATEVER

{% hint style="info" %}
Keep in mind to always use 5 times x eg xxxxx.\
Keep in mind to always use 2 times m eg mm.\
Keep in mind to always use 4 times y eg yyyy.
{% endhint %}