How do I change boot sequence

[pcaffeldt]

I have Toshiba Satellite c55t-a522. How do I change boot sequence at start up

 

[rgd1101]

http/support.toshiba.com/support/modelHome?freeText=1200005866
here the manual

 

[chris987]

after post hit del to enter bios and on boot options there is boot priority that you can change. save and exit bios