draw line arrows in inkscape

inkscape is a nice app for drawing vector figures. but when i tried today to draw a simple one, i couldn't even find the line arrow! fortunately google helps here: http://inkscape.gristle.org/2005-04-25.txt

it's too hard to access this little tiny corner of settings if you don't know!!!
1. draw a line first
2. make it selected
3. click "fill & stroke" dialog
4. in the tab "stoke style", there is arrow style for end markers for all kinda shapes.

hope it'll be useful for others.