Halfing and Instant Transfer on pocket edition should be easier.

Please. I'm having trouble understanding how to quick move items between my inventory and the chest on pocket edition. I have seen a wierd green line above stacks when I try and move them, and smaller stack splitting, but I don't understand how to use it. I also don't know how to Instant move items to the chest like shift+right-click on PC. There should be an easier option like a pop up menu or a double click on an item to quick move it. Thank you.