scrcpy is an application for displaying and controlling your Android device through USB connection (or over TCP/IP). It is cross-platform (GNU/Linux, macOS and Windows) and does not require any root access.
scrcpy displays only the device screen but offers great performance (30~60fps) and quality (1920×1080 or above). It’s got low latency (35~70ms) and a very low startup time (less than a second). It offers plenty of great features and is non-intrusive, with nothing left installed inside...
SecondScreen is an application designed for power users that frequently connect their Android devices to external displays. It works with your existing screen mirroring solution to give you the best experience possible. With SecondScreen, you can change your device's resolution and density to fit your TV or monitor, enable always-on desktop mode in Chrome, and even turn your device's backlight off, among several other features.
Use your tablet as graphic tablet/touch screen on your computer
...Start Weylus, preferably set an access code in the access code box and press the Start button. This will start a webserver running on your computer. To control your computer with your tablet you need to open the url http://<address of your computer>:<port set in the menu, default is 1701>, if possible Weylus will display to you the url you need to open and show a QR code with the encoded address. If you have a firewall running make sure to open a TCP port for the webserver (1701 by default) and the websocket connection (9001 by default).