Background

Color
This is the color retrieved from the gif marked as a background color
However, you can select another color to be a background - this will allow you to turn almost any gif into the transparent gif.

Transparent
Make the selected color transparent - sometimes if you see the result very strange - select other background color (for example the gif is on white background, but the background color was retrieved as a black)

Auto Play
Automatically start playing the gif on Show or page start.

Tile
You have to resize the gif first (make it bigger) and then click this option. This will let you to create animated patterns. Not all gifs are good for this function - you cannot use transparent option.

Loop
The gif will loop the animation

Hide after last frame
This will hide the gif after last frame was displayed - good for showing some animation, which will hide itself on the end.