Introduction - If you have any usage issues, please Google them yourself
Let C# form controls, buttons and menus change with the change in the size of the form, in Word, you will see, when the Word form is not maximized when those buttons will be automatically hidden, use the arrow instead, click the arrow will show the hidden button, then the form on the realization of this function, when you drag the window big when it comes to a complete show that the menu button, the window becomes smaller, they automatically hidden.