I put them right in the brief. I had the defense side of a complicated accounting malpractice case. The essence of our motion for summary judgment was an argument that my client had no duty, in the course of a company audit, to discover improprieties relating to a joint venture investment of the company. Our goal was to use pictures to enlarge the distance between our auditors and the joint venture entity. While you can make the same point in writing, the impact is not the same.
Judges spend their lives looking at mostly boring copy.
Adding a bit of color to their lives will not only get their attention, it will help you make your point. I have been to several summary judgment arguments only to find the judge looking at my graphics while she grilled the other side on my strong points. Timelines are as effective in a summary judgment brief as they are in trial. In the same accounting case, we added a chronology to help reinforce the point that our audit came so far after the wrongdoing took place that discovering it would have been useless. Without question, we could have made the point through the written portion of the brief, and we did.