Tex. R. Civ. P. 272
The charge shall be in writing, signed by the court, and filed with the clerk, and shall be a part of the record of the cause. It shall be submitted to the respective parties or their attorneys for their inspection, and a reasonable time given them in which to examine and present objections thereto outside the presence of the jury, which objections shall in every instance be presented to the court in writing, or be dictated to the court reporter in the presence of the court and opposing counsel, before the charge is read to the jury. All objections not so presented shall be considered as waived. The court shall announce its rulings thereon before reading the charge to the jury and shall endorse the rulings on the objections if written or dictate same to the court reporter in the presence of counsel. Objections to the charge and the court's rulings thereon may be included as a part of any transcript or statement of facts on appeal and, when so included in either, shall constitute a sufficient bill of exception to the rulings of the court thereon. It shall be presumed, unless otherwise noted in the record, that the party making such objections presented the same at the proper time and excepted to the ruling thereon.
Tex. R. Civ. P. 272