Select your impeachment list. All designations are set to play consecutively as you can see by the arrows pointing down. This is the default for all designation lists.
Right-click on the list and select Automatic Advance – click on Enable Auto-Advance to remove the checkmark.
Unchecking Enable Auto-Advance changes the Auto-Advance Arrows in the list to point left. Pointing left means the designation will play and stop after it plays.
After fine-tuning (see Basic Fine-Tuning Designations and Advanced Fine-Tuning Designations articles) your designations are ready to go. When you publish a designation, it will only play that designation and not continue playing.
Have impeachment clips with more than one designation? No problem. You can double-click on the Auto Advance Arrow to change whether it advances or stops. In the image below, publishing VJ1.13 will also play VJ1.14. Playback will stop after VJ1.14 plays.