In Windows Guest OSes
Parallels Workstation allows you to define up to 10 different resolutions for a Windows virtual machine and change them when running the guest OS. Note that these resolutions should be no less than 800x600.
Adding a Screen Resolution
- Open the virtual machine configuration you want to add a resolution to, click the
button to open the Configuration Editor. - In the Configuration Editor, select Video in the Resource list.
- In the Screen Resolutions tab (see Video (Screen Resolutions) ), make sure the Enable custom screen resolutions option is selected.
- Click the Add button
to open the Resolution Properties dialog. - In the Resolution Properties dialog:
set the desired resolution options in the Width, pixels and Height, pixels fields. Note that width value should be divisible by 8;
select the Enabled check box if you want this resolution to be available for selection in the guest OS;
click OK.

- Click OK in the Configuration Editor.
- Click
to save the virtual machine configuration.
Changing Screen Resolution for a Virtual Machine
To change screen resolution:
- Power on your virtual machine.
- Right-click on the Windows desktop and select Properties->Settings in the context menu. On the Settings tab, will propose for selection all the resolutions available in the Video (Screen Resolutions) tab for which the Enabled option is selected. Select the one you want.