To empanel a jury means to select the jury and seat them for jury service. This occurs at the trial court level. In an appellate context, it would only apply to an appeal from a lower court, such as a justice of the peace or county court at law.
This attorney can be contacted via email at email@example.com or via phone at 817.305.7170. The above answer does not constitute, and should not be construed as, legal advice.