From http://www.economist.com/node/16789226 and http://www.graphis.com/cfe/online/designannual2012/?id=3814 (both have details):

Notes:
Notes:
- Focus on the image(s), not the texts and watermarks (if any). If it is a screen capture from a television/TV show, movie, game, etc., then make your own caption. You don't have to use its theme, but it helps.
- Use
SayWhat
to
add
dialog
bubbles
and
texts
to http://media.economist.com/images/images-magazine/2010/33/st/201033std001.jpg
and http://www.graphis.com/images/cfe/thumbs/47_designannual2012/3814_0cbdcfd1059fb93d6b5294cf23113181.jpg ...
- You can do silly doctoring and captioning like I CAN HAS CHEEZ BURGER and others for it/them. Use roflbot is recommended for this case.
- Ignore the technical errors like missing legs, antennae, etc. if any.
- If there is more than one images, you do not have to caption/doctor all of them. Do one, do each one separately, or all together for captioning or doctoring.

