Preheat the oven to 450 degrees F. Grease a rimmed baking sheet with nonstick spray.
Stretch the dough into a rectangle on the greased baking sheet. Mix together the butter and 1 1/2 tablespoons bagel seasoning, then spread along the outside edge of the dough. Bake until the crust is golden brown, 10 to 12 minutes. Let cool completely.
Using a rubber spatula, spread the cream cheese evenly over the pizza, leaving the crust edge exposed. Top with smoked salmon, avocado and red onion. Sprinkle with chives, dill, capers if using and the remaining 1/2 tablespoon everything bagel seasoning.
this is a to taste recipe, you like something add more, you dont use less.