The Steam Link app has gotten a new Beta update and it adds on-screen touch controls to the app. This means that you no longer need to use a controller with your Steam Link to play games on devices such as mobile phones. It even taps into the phone's gyro and vibration features to allow for a plethora of options in controlling your games including per game control customization. The heart of the editing mode is the tray, which will pop up when you pick 'Layout Controls' from the [ ... ] button. From here, you can drag controls out of the tray to place them, select 'Edit Layout' to move/scale/remove existing controls, 'Cancel' to clear all changes since you last saved, or 'Done' to save your changes. To place a control, simply touch it and begin dragging it. The tray will close, and you can place the control where you want. If you grab the button diamond or the Select/Steam/Start buttons, they will come together as a group for quick placement.