
If you want to speed up the animation, increase the speed percentage (for example, if you enter 200% speed, then the animation will play at twice the original input speed), if you want to slow down the animation, decrease the percentage (for example, if you enter 50% speed, then the animation will play at half the original speed). By default, the boomerang speed is equal to the input GIF speed, which is 100% when expressed in percent (see the speed option). Often, the boomerang looks much better if it's played faster or slower, so we also added options to change the boomerang playback speed. The loop options include playing the boomerang GIF only once, playing it a specific number of times, or playing it endlessly forever. The boomerang is looped forever but you can change how many loops the boomerang performs. In the frame selection option, the value "*" means all frames, the value "2-12" means use frames 2 to 12 (inclusive), and the value "1, 3, 5, 7, 11" means use individual odd frames 1, 3, 5, 7, 11. By default, the boomerang is created from all the frames in a GIF but you can select individual frames or a frame range that will be used to create the boomerang. As the original GIF is repeated, the number of frames in the boomerang GIF is double the number of frames in the original GIF. The boomerang effect repeats a video or an animation over and over from the start to the end and back to the start again. This is a browser-based program that converts animated GIF files into GIFs with the boomerang effect.
