How do I take a picture of my Sim?

the options to take screenshots is not enabled yet

in the demo go to the three dots -options put the demo into windowed mode then hit the printscreen button on the keyboard open the paint program then ctrl+v to paste the printcreen into the paint program then save your image or if you have snipping tool if you have win 7 or 8 you can use the snipping tool open snipping tool then drag your cursor over the area to snip the image you want to capture lift your finger of the mouse then the image will pop open save it

(tip from crin ty)  if you have Fraps you could use that   make sure to start fraps frist and then the demo or the demo will crash

Everybody has really cool profile pictures of their Sims. How are you able to do that? I can't figure it out! 

By making a screenshot, with print screen or with C, then taking it in to Photoshop. 
I also use the 'take photo of' on the in game bought camera's, and even use the photo studio.