1-Choose the VM you would like to modify.
2-Click on Networks tab.
3-Click on “+ Add interface”

Choose the subnet and the desired IP.
Please note: if you don't find any IPs you can allocate a new private IP, please refer to https://docs.cloud.site.sa/MyCloudPortal/how-to-assign-i-ps-from-cloud-portal
1- Choose the VM you would like to modify.
2-Click on Networks tab.
3-highlight the interface you would like to delete, and click on the delete icon.

Note: a VM must have at least 1 network interface.