With this Blender addon you can display mouse and keyboard input

• Download the shortcut_VUr-master.zip file from Jayanam's Github https://github.com/jayanam/shortcut_VUr (Press green button top right corner).
• In Blender 2.8 go to Edit > Add-ons and on the right side of that window click on Install button.
• In pop-up window navigate to where you downloaded the shortcut_VUr-master.zip file, select it and click Install Add-on from File... button on top right corner.
• Back in the Add-ons preferences window search for Object: Shortcut VUr check the checkbox next to it and click Save Preferences button if you want to be able to see it on any new Blender projects you open.
• Back in your 3D Viewport (Shift + F5), On the right side of the 3D Viewport you will see a vertical tab called Shortcut VUr, click on it and then press Start Shortcut VUr button to start seeing the mouse clicks and the keys you press on your keyboard on the lower left side of your screen.