How can i indicate a folder or desktop when i download from google chrome ?

i mean when you download something film or whatever you have to indicate a folder so how ? )How can i indicate a folder or desktop when i download from google chrome ?
here u have step by step

http://browsers.about.com/od/googlechrome/ss/chromedownload.htm

or if this doesent work, o the first 2 steps from web page.

then on ur left side ull see "under the hood", there u will find download location