Graphic demonstratives have become an essential component in complex litigation and an expert with experience using demonstratives will have a distinct advantage over one who is unaccustomed to using visual aids. Ask whether the expert has extensive experience creating his or her own visuals. Does the expert need or could the expert, or your client by extension, benefit from professional assistance developing visuals at the report-writing, hearing, or trial stages? Assessing these issues early can prevent missteps and lost opportunities later.
Use a graphics consultant to help the expert develop visuals that are easily accessible to the layperson. Focus the consultant on improving their teaching skills as well as the clarity and persuasiveness of their testimony. Such work can often improve how an expert is received in any venue, not just ones where you foresee some venue-specific difficulties.