Ubuntu installed, UEFI and booting from CD ROM to install Opensuse

[bilal ghayyad]

Hello;
I have a Dell Computer (OptiPlex 7060) which is running Ubuntu and its BIOS is UEFI. I need to boot from CD ROM to install OpenSuSe using ISO file, I checked the BIOS setup (Boot Sequence) and did not find the ability to select CD ROM to be from the sequence. So, how I will boot from CDROM?
Can it boot without need to add the CD ROM? Why I can Add the CD ROM as sequence?
I tried to disable the Security Boot but still I can not select or CD ROM as sequence.
Appreciate the kindly help.
RegardsBilal
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