At this point we could create the rest of the test steps to ensure that elements on the page have resized appropriately, but all we had done so far is test out one size. What if there were several different size screens that we wanted to test? We could make all of our test steps, resize the screen and then make all the same test steps again. This would require a lot of repetition and not be very nice to make and maintain. Thankfully TestProject has a powerful feature we can use here: parameters.