Choose Create Virtual machine from Virtual machines tab.
Set the VM guest name (in this case genoa) and choose which datastore to store the VM on (in this case centralblob1)
Choose the VM guest operating system.
Set the system memory and number of CPUs for the VM guest. Note that these can be changed later, despite the contrary advice given (which only applies to Windows guests)
Create a new virtual disk for the VM guest.
Set the size of the virtual disk. At least for installation, set the Disk Policy to "optimise for performance". You can change this to "optimise for safety" at a later date, but this has a measurable impact on performance and is most appropriate for VM guests that have master copies of data.
Add a network adapter.
Choose the appropriate network connection to use for the network adapter (normally "bridged").
Verify the settings for your VM before clicking on "finish" to create the VM.
The new VM guest will be visible in the Inventory table.