Clooz provides over 230 different templates to match the types of information contained in the type of document you find. You simply fill in as much of the information you find useful. Keep in mind though that entering all available details gives you the most benefit down the road, especially fields that help define an event or family structure. You never know when some seemingly unimportant detail today becomes of great interest in the future.
It is surprising how many people comment that going through the process of transcribing a document's details forces them to actual read the details and uncovering a relevant fact which they have missed looking at it many times before.