app inventor 2 tutorials for beginners - 04 layout arrangement & lesson3 's extra challenge Published 7 years ago • 31K plays • Length 9:31 Download video MP4 Download video MP3 Similar videos 21:36 how to create new exercise app using mit app inventor 2 8:03 app inventor - buttons positioning 9:05 how to merge multiple mit app inventor screens/projects || mit app inventor 2 || merge projects