When exporting an animated gif in Gimp (each layer is a frame of the animation), you can set the speed between each frame (layer) as a fixed number, by default 100 milliseconds. How do you instead specify:
- 100 ms between layers 1 and 2
- 200 ms between layers 3 and 4
- 500 ms between layers 4 and 5
and so on? If not .gif, then how about .png animation?