How to change the styling of the dotted line around focused button globally in wpf?

Question

I have multiple buttons and images in my WPF applications and would like to make the dotted line around focused buttons and focused images thicker for all of them.

I don

Answer 1

You can simply define an implicit Style targeting Button or Image or any other focusable Controls, place this Style is such as App.Resources or some separate ResourceDictionary: