menu button

is there any way that i can add a menu button that links to another site?

yes

admin panel
display
headers & nav

create a new nav

yes but it only allows u to make buttons that link to ur site not to some other site

yes it does!

click on create "cusrom link"

where?

thats where i went and when i made da button it said error and brought me back to my site
oh and if u look all the pre mades have the URLs of the end of the website link (eg. /gallery.index.htm instead of www.<your site name here>.com/gallery.index.htm)