Tex. R. Civ. P. 505.3

As amended through May 28, 2024
Rule 505.3 - Motion to Set Aside; Motion to Reinstate; Motion for New Trial
(a)Motion to Reinstate after Dismissal. A plaintiff whose case is dismissed may file a motion to reinstate the case no later than 14 days after the dismissal order is signed. The plaintiff must serve the defendant with a copy of the motion no later than the next business day using a method approved under Rule 501.4. The court may reinstate the case for good cause shown.
(b)Motion to Set Aside Default. A defendant against whom a default judgment is granted may file a motion to set aside the judgment no later than 14 days after the judgment is signed. The defendant must serve the plaintiff with a copy of the motion no later than the next business day using a method approved under Rule 501.4. The court may set aside the judgment and set the case for trial for good cause shown.
(c)Motion for New Trial. A party may file a motion for a new trial no later than 14 days after the judgment is signed. The party must serve all other parties with a copy of the motion no later than the next business day using a method approved under Rule 501.4. The judge may grant a new trial upon a showing that justice was not done in the trial of the case. Only one new trial may be granted to either party.
(d)Motion Not Required. Failure to file a motion under this rule does not affect a party's right to appeal the underlying judgment.
(e)Motion Denied as a Matter of Law. If the judge has not ruled on a motion to set aside, motion to reinstate, or motion for new trial, the motion is automatically denied at 5:00 p.m. on the 21st day after the day the judgment was signed.

Tex. R. Civ. P. 505.3