what is the best tool for this action?
uh...the Print Screen key on your OS...
On Windows it's one button (labeled "Prnt Scrn") but on OSX it's the much more intuitive Option-Control-Alt-Something...
Need to "print screen" the hole website.
On a Mac, taking a screen shot just saves the portion of the screen visible on your monitor, so long web pages might get cut off.
A workaround is to press Command-P (Print) and in the print dialog box choose Save as PDF. The resulting PDF will be of the entire web page.
On a Mac, I use [[http://www.tastyapps.com/websnapper/|WebSnapper]] as this can save a webpage as a PDF where it makes the page as long as necessary for the whole content, i.e. no page breaks.
Acrobat Pro will capture a website into PDF also:http://help.adobe.com/en_US/acrobat/X/pro/using/WS58a04a822e3e50102bd615...
For Mac, Paparazzi is by far the best utility I've used. It's a great tool.