Fallow the steps .......
Select the temple (In my case i chose Centos 7)
Set the name of you VM
Chose the Installation Media. if you use DVD Drive click next or if you want to use ISO library, plz select your ISO
Select Homeserver (In my case i use one xenserver so shown that)
Select virtual CPU (In my case u use 2 vCPU) & set RAM (In my case i use 2GB RAM)
Select Storage (IN my case I use 20GB Storage) and rename the Virtual HDD Name
If you need a virtual network, then add and create one. In my case no need.
Finally click on “Create Now” to create a VM.
Now start VM and install your Virtual Server operating system.