Changing the configuration is available for Virtual Machines with the status Active or Shutoff.
In the Actions dropdown menu, select Resize. Choose a new configuration and click the Change Configuration button.
Important: For Volume-backed Virtual Machines, the disk size will not change when resizing the instance. To increase the disk space, you must separately expand the Volume.
Wait until the status changes to Verify Resize.
To confirm the changes, go to the Actions dropdown menu and select Confirm Resize. To cancel the changes, select Revert Resize.
The configuration change is complete. Wait for the Virtual Machine status to update.
Video tutorial