Jurors must be permitted to take written notes in all civil and criminal trials. At the beginning of a trial, a trial judge must inform jurors that they may take written notes during the trial. The court must provide materials suitable for this purpose.
Cal. R. Ct. 2.1031
Comment
Several cautionary jury instructions address jurors' note-taking during trial and use of notes in deliberations. (See CACI Nos. 102, 5010 and CALCRIM Nos. 102, 202.)