> For the complete documentation index, see [llms.txt](https://documentation.opencrvs.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.opencrvs.org/v1.6/setup/4.-functional-configuration/4.1-configure-application-settings.md).

# 5.1 Configure application settings

### Before you start

* Only a National System Admin can configure application settings
* You can make changes to application configuration whenever you like.

![](https://content.gitbook.com/content/YTKQAa9NKqMdS5tq1TB3/blobs/oBWSHjnmBXIUjdH0uWlU/app-config.png)

### **Steps:**

1. **Change application name**\
   This appears on the top left header for all users. We recommend \[Country name] CRVS.<br>
2. **Upload a logo**\
   This is used on the login and declaration review screens<br>
3. **Set your currency**\
   Set the currency for your country. This is used as a label for when fees are required for printing a certificate and on the performance dashboard<br>
4. **Set your mobile number regex**\
   This is used to validate phone numbers entered in the declaration form. For guidance please refer to [www.regex101.com](http://www.regex101.com)<br>
5. **Set your National ID regex**\
   This is used to validate national IDs entered in the declaration form. For guidance please refer to [www.regex101.com](http://www.regex101.com)<br>


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