Most effects and some stickers have settings that can be changed. This can help fine-tune the way they apply to your video to create just the right look.
To adjust an effect or sticker setting, tap the layer to select it. Then tap the Settings button in the Options Panel that opens on the right.
Settings available to adjust are unique to that particular effect or sticker. If you aren’t sure what a particular slider does, experiment! The Preview screen to the left of the Options Panel will give you a live update, allowing you to see how adjusting the Settings will affect your video.