Desktop HP DeskPro G6 minitower, BIOS ver. 02.05.01
OS: Windows 10
I want to boot and install from DVD another OS (Linux CentOS 7)
I read this official documentation https://support.hp.com/us-en/document/c04784866
I turn off Secure Boot, but I can't found menu Legacy Support.

And as result I can't boot my computer from DVD. When I select (in Boot Menu) boot from DVD nothing happend.

P.S. DVD-ROM success work and read data from my DVD.