The correct way is to use Button1 to toggle between the Screens
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This example works:
SimpleVirtualScreens.aia (2.1 KB)
@Richael_Mehla you may want to adjust your tutorial.
Tim, the recommended Blocks do not work for me either. To show what is happening, I recommend placing a Button in HA1 that is red and one in HA2 that is blue.
I also recommend you change your screen name; what you have is a etiquette Discourse reserved word.