Hi Fox Lee! Thank you so much for using my software. Regarding ur questions. Firstly keyboard command. F1-F5 is the shortcut key but unfortunately it won't work if Gazo Tuber is in the background. I will push an update to make it usable even in the background. Secondly, Blue Button. If you are using more than one presets, for example Preset A for "Neutral" and Preset B for "Sad". If you move the PNG position or zoom in and out on Preset A, PNG on Preset B won't have the same position as Preset A. The Blue button is "omni button" where it will make all Presets to share same PNG Position and Zoom level. Geez I hope I'm not confusing you hahaha.