Or 1-2 seconds. The 3 steps are explained at the top of the Google search: https://www.google.co.uk/search?q=change+font+size+iphone https://www.google.co.uk/s

Or 1-2 seconds. The 3 steps are explained at the top of the Google search: https://www.google.co.uk/search?q=change+font+size+iphone https://www.google.co.uk/search?q=change+font+size+iphone