I have the Smart TV on, then I have it connected to Smart View on iPad. I go to Facebook on the TV but on the iPad it says 'To use this app, select Allow on the TV screen". How do I do that?
You need to access either the Settings menu for Smart View or for the Smart TV itself. On one of the menus there should be a list with the apps and devices connected to the TV. Select your device and add it to the Allowed list of devices that have full control over you smart TV.