Create a Tag. The tag can be mapped to to an address on a PLC if that makes more sense for your system. For this example, I'll call the tag, "ScreenTag".
Click on the [...] button under the "Action" column.
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tag_action.jpg [ 82.58 KiB | Viewed 7180 times ]
Here you can configure the properties of the "ScreenTag" to change screens depending on the value of the tag. For the attached screen shot, if I wanted to change to "Screen1", I would set the "ScreenTag" to be a value of 1.
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screen_dynamic_tag_props.jpg [ 69.67 KiB | Viewed 7180 times ]