Minimize button has dissapeared

[mickyteeth]

Hi all, I'm new to this forum but would like to pick your brains. I've been using my Mac for about 6yrs now and noticed last week that the yellow minimize button has gone... The red & green are still there but no yellow. Does anyone have a simple fix for this?
Please keep it simple as poss as i'm quite old and not as savvie as i used to be. Many thanks in advance.

 

[bogdanw]

From all the apps? Or just in Safari or Finder? As a temporary fix, you can always minimize a window using the shortcut Command-M (⌘+M) "Minimize the front window to the Dock. To minimize all windows of the front app, press Option-Command-M." https://support.apple.com/en-us/HT201236