How can I see the pixels like on a ruler?

[flatronl192ws]

I can't figure out what to do to see the pixels like in the image below:

http://imageshack.us/photo/my-images/534/pixeli.jpg/

Help please?

 

[flatronl192ws]

Sorry but I need 4 posts to be able to include a link in my 1st post.

 

[flatronl192ws]

Sorry but I need 4 posts to be able to include a link in my 1st post. 3rd

 

[flatronl192ws]

Sorry but I need 4 posts to be able to include a link in my 1st post. 4th

 

[Steve]

If you're asking how to show the ruler it's View|Rulers or Ctrl+R Cmd+R on a Mac

 

[Paul]

Never new that Steve, why do some images from Google have the blue lines down then sometimes?