A lawyer’s time is limited — and, consequently, highly valuable — at trial because he only has so much of it before the judge tells him to move on or the jury becomes bored and stops paying attention. Eventually (usually sooner versus later), the time available to present evidence and make a compelling case runs out. The lawyer who has not carefully prepared, rehearsed and timed his presentation will be at a great disadvantage when up against counsel who entered the trial with a keen understanding of time as a finite resource.
Another valuable yet limited commodity during trial is space. There are only so many available square feet inside the courtroom that can be used for display boards and screens, flip charts and the like. Further, there are only so many square inches on these visual displays that can be used before the information on the graphics becomes illegible and unusable.