Steamdeck control with hotbar for build menu

look at my setting to learn the control then try to use left trackpad, click center menu to enter hotbar for menu I built for build mode(press X to manually bring up in-game build menu). Nothing will appear at first, it's normal, you have to bring up hotbar by yourself. How to use hotbar? use it like a dpad, push down and hold on trackpad then slightly move diagonally on either sides to bring up hotbar for the first time, press left or right on trackpad to navigate, press up to select, press down to hide.