Assuming you have already programmed with basic variable and know how to create a variable, i'll skip to the setting of a text variable.

When you create the If/Else, set it to true. In my example, I added my system off macro under IF and then set the variable state to FALSE. So, lets say I create a power off button that shows the status of the power for zone 2. When I enter a zone 2 source, I will set each to variable = true in the source macro. This will ensure that that button will show the zone is on.

Now in the properties window, at the top, select the variable you created. The normal text and normal image properties will be viewed when the variable is set to False. The pressed text and pressed image will be viewed when the variable is set to True