Can't find the place to add in image caption I installed image caption module and enable 'Image caption filter' under Home » Administration » Configuration » Content authoring » Text formats.

But I can't the place to add in the image caption.
The project page is somehow missleading and most of the info there is for D6 version. But at the bottom, it clearly states:

jQuery caption
  Less module code
  No configuration needed
  Better javascript captioning logic


You can also refer to this issue for more info.