You can increase or decrease the duration of text overlays on your video from the timeline.
Here’s how you can do this:
Step 1: Click the text overlay on your video. When you select a text overlay or any other overlay element, you will notice two handles on the timeline that depicts an active area.
Step 2: This area of the timeline indicates the duration of the overlay on the video. This can be changed by extending the left and right handles on the timeline.