You can specify the number of monitors and resolution for your instant-clone desktop pool in the vSphere Client by setting those parameters in the golden image and taking a snapshot.
- Number of monitors
- VRAM size
The instant-clone desktop pool created is based on the golden image snapshot and inherits those memory settings. You cannot configure these settings in Horizon Console for instant-clones.
For more information about configuring video memory settings in vSphere Client, see vSphere Single Host Management in the vSphere documentation.
For more information about changing the resolution for your instant-clone desktop pool, see the VMware Knowledge Base (KB) article http://kb.vmware.com/kb/2151745.