By using the vCloud Air portal, you can change the properties of a virtual machine by selecting the particular virtual machine that you wish to modify. Click on the Actions tab and select the appropriate parameter that you wish to change:
Change name and description: You can edit the name and description of a virtual machine either when it is powered on or off. Simply select Edit Name and Description from the Actions tab and provide new and suitable values, as required.
Edit resources: vCloud Air also allows you to add and remove resources from your virtual machines only when they are in a powered-off state. Simply select the Edit Resources from the Actions tab. This will bring up the following dialog, as shown: