How to add custom networks 
For Ultra Pro Wallets, it is possible to add custom networks for testing purposes.
This is the correct procedure:
- Open your Ultra Wallet extension, click on the environment dropdown at the top of the screen, and click the button “Add Network”  
- Fill all the fields with your custom network parameters and click “Add Network” - Network name: This is the name used to be displayed in the environment dropdown list.
- Network HTTP URL: URL used to connect to your Ultra blockchain node, for more information follow this documentation page.
- Block explorer URL: URL for the blockchain explorer, for example, https://local.bloks.io
  
- Custom networks can be edited or deleted if it is needed 