When high resolution external monitors are plugged in and unplugged the windows get rearranged and several of my apps routinely get moved almost entirely off screen. There is only a sliver of the app available, not enough to grab and move. How can I get these windows back on the screen?
There are many answers to this problem for previous macOSes, but they don't seem to work on High Sierra.
Best Answer
Go to the dock, click the icon for the application that is off screen, this will make it the focused application. Hold option and click on the application icon again, this will hide the application. Then release the option button, and click the application icon in the dock again and the app will be fully displayed on the screen.