You may need to change the configuration of a Virtual Machine (VM) after it has been created. For example, you may want to add more memory.

Be careful when changing VM settings. It is possible to change all VM settings after installing a guest OS, but certain changes might prevent a guest OS from functioning correctly if done after installation.

To change the settings for a VM:

1. Select the VM in the Machines list.
2. Ensure the VM is Powered off, not Running or Saved. You can't change fundamental characteristics of the VM if it is running.
3. Click Settings to see the current configuration for the VM, and change the parameters as required.

The parameters are described in detail in .

Even more parameters are available when using the VBoxManage command line interface. See .