How to change the close/minimize/maximize icons on the titlebar of the window?

[Tink]

You asked me this same question on another thread. I answered you there.

Customizing Desktop Window Theme CSS Gnome

Hi and welcome to linux. Are you asking how I changed the color of buttons on the min/max/close buttons? If so, I installed a gnome shell theme to that bit. To learn how to install themes and customize your desktop, read this thread: If you want to change the function/lay-out etc of those buttons, you need to install Gnome Tweaks. Here's how: