Open the Moonlight client on your local device (before starting a stream).
Mastering Alt-Tab in Moonlight: A Complete Guide to Remote Multitasking alt tab in moonlight
Ideally, when a user presses Alt-Tab, the intention is to switch windows. However, the operating system of the client device (the computer or phone running Moonlight) competes with the application for control of these shortcuts. If the client operating system intercepts the command, the user will switch out of the Moonlight app entirely. If Moonlight captures the input, the command is sent to the host PC, where the operating system there attempts to switch windows. This dichotomy is the source of much user frustration. Open the Moonlight client on your local device
Moonlight is a fantastic tool that allows you to play PC games on your NVIDIA Shield or other Android devices. One of the most useful features in Moonlight is the ability to quickly switch between games and other apps using the Alt Tab function. If the client operating system intercepts the command,
For the Alt-Tab command to affect the host computer—allowing a user to, for example, switch from a game to a Discord window on the host PC—Moonlight must be configured to capture system-level shortcuts. Moonlight offers a "Capture System Keys" or "Capture Alt-Tab" setting within its configuration menu. When enabled, this feature traps the keystroke before the client OS can process it, sending the signal exclusively to the host. Consequently, the host PC executes the window switch, changing the focus of the remote session without minimizing the streaming client on the user's screen.