- Click on the toolbar button in the lower left corner.
![](https://cdn.ziicloud.com/knowledge-base/2022/11/01115237/%E6%89%93%E5%BC%80toolbar.jpg)
- Go to settings
![](https://cdn.ziicloud.com/knowledge-base/2022/07/27193410/639a0fcf-17ba-4491-8c41-e9554308decf.jpg)
- Click the button like the one circled in the picture and find a selection named “profile”.
![](https://cdn.ziicloud.com/knowledge-base/2023/09/12135434/image-1024x519.png)
- Find a field named as “invoice NO. Initial” and drop down this page till you find a modify button then turn it on.
![](https://cdn.ziicloud.com/knowledge-base/2022/06/20183836/1-27.png)
![](https://cdn.ziicloud.com/knowledge-base/2022/06/20183850/1-28.png)
- Drop back and you can modify the invoice NO. initial of your store.
![](https://cdn.ziicloud.com/knowledge-base/2022/06/20183913/1-29.png)
- Drop down this page and click “save” to save the change.
![](https://cdn.ziicloud.com/knowledge-base/2022/06/20183925/1-30-1.png)