HP 1930 Vlans

Hello,

I purchased HP 1930 and I want to connect to my FortiGate. 
On Fortigate I configured an interface with IP and a subinterface VLAN 6 with IP. 
I would like to do trunk on 1930 with native VLAN. I didn't understand how to do it. 
I would need to configure on 1930 VLAN 1 as native VLAN and VLAN 6 as tagged. 
How can I accomplish that?

Thanks