Fixed site

Hello guys,
Im a newbie,im starting learning the htlm code and css so im here to find some help from you.
Im creating my peronal portefolio website, i'd like to get some help on creating a website page in a single page if u know what i mean, like when i click on meu bar it drop down to the page choosen and not to when clicked open a new aba/page u see?
Cheers!

See original post by andremdbag