Usually all your windows are either in front of you or rolled into the taskbar. But Windows is a mysterious thing, and sometimes things happen in it that shouldn't happen. For example, sometimes open windows appear outside the visible screen.
This happens most often if you're using a laptop with a connected external monitor or multiple displays at the same time. But on a stationary computer with one screen, this also occurs.
You see the bottom edge of the window and you can't get to the head, where the control buttons are located. Here are a couple of ways to solve the problem.
Expand the window through the Taskbar
Hover over the open program icon on the taskbar. There will be a preview of the window. Click on it with the right button and click "Expand." Ready.
Use a combination of keys
Tap alt and Tab and Tab select the window you want. Then tap Alt q Space X. This will turn the window on the whole screen. Then you can move it where you want, adjust the size or close it.
Cascade the windows
Click the right button on the taskbar. Select "Cascade Windows." All open programs will appear in front of you, and you can sort them.
Change screen resolution
Click the right button on your desktop and click "Screen Settings." In the open window, change the resolution to some other one that is available to you. Windows will move all out-of-screen windows back to the display. You can then return the resolution you had by default.
Turn on display detection
Tap the right button on your desktop and select Screen Settings. Then click "Discover." Windows will return the missing windows to the screen. It helps if the problem is due to the fact that you have several monitors.