<layers> <visual> <param name="translation_y" type="anim"> <duration>0.4</duration> <style>outquad</style> <keyframe at="0.0">0.0</keyframe> <keyframe at="1.0">1.0</keyframe> <start ref="visual.top">-1.0</start> <end ref="visual.bottom">1.0</end> </param> </visual> </layers>