How does PS make GIF pictures with shimmer?

1. Open a background layer with PS, which can be any picture.

2. Then click on the text tool and enter what you want to say.

3. Copy the text layer and click fx in the lower right corner to add the layer style-external light-light yellow.

4. After that, click Animation and Timeline to make an animation. Generate one by default, and select the background and original layer.

5. Create a new frame, select all three layers, and set the action time to be consistent, always 0.2 seconds.