XPS 8900 BIOS boot sequence changed

I thought I posted this once before so I am sorry if it is a duplicate.  Can't find original.  I have 2 yr old 8900 with HDD, optical DVD, and several ext HD drives connected via USB.  The boot sequence in BIOS got changed and I can't get it back (I was bad).  Can anyone with a similar configuration look at boot seq in bios, for UEFI (I think. Not legacy) and report it.  Specifically, select each line in boot seq, click on VIEW, and write down the 3 entries.  Don't know if this will fix it, but I can try.  Thanks.